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EP3763845A1 - Alliage de magnesium et son procédé de fabrication - Google Patents

Alliage de magnesium et son procédé de fabrication Download PDF

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Publication number
EP3763845A1
EP3763845A1 EP19184999.1A EP19184999A EP3763845A1 EP 3763845 A1 EP3763845 A1 EP 3763845A1 EP 19184999 A EP19184999 A EP 19184999A EP 3763845 A1 EP3763845 A1 EP 3763845A1
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EP
European Patent Office
Prior art keywords
magnesium alloy
magnesium
weight
heat treatment
aluminum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP19184999.1A
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German (de)
English (en)
Other versions
EP3763845B1 (fr
Inventor
Stefan Gneiger
Clemens Simson
Simon FRAN
Alexander GROßALBER
Andreas Betz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
Original Assignee
LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
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Publication date
Application filed by LKR Leichtmetallkompetenzzentrum Ranshofen GmbH filed Critical LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
Priority to EP19184999.1A priority Critical patent/EP3763845B1/fr
Priority to PCT/EP2020/058280 priority patent/WO2021004662A1/fr
Priority to CA3137604A priority patent/CA3137604A1/fr
Priority to KR1020227000723A priority patent/KR20220030244A/ko
Priority to CN202080046287.5A priority patent/CN114026260B/zh
Priority to US17/625,359 priority patent/US20220259705A1/en
Priority to JP2021567860A priority patent/JP2022540542A/ja
Priority to JP2021568980A priority patent/JP2022540544A/ja
Priority to KR1020227000718A priority patent/KR20220030243A/ko
Priority to US17/625,360 priority patent/US20220267881A1/en
Priority to EP20735621.3A priority patent/EP3997251A1/fr
Priority to CA3138658A priority patent/CA3138658A1/fr
Priority to CN202080049996.9A priority patent/CN114096690A/zh
Priority to PCT/EP2020/069131 priority patent/WO2021005062A1/fr
Publication of EP3763845A1 publication Critical patent/EP3763845A1/fr
Application granted granted Critical
Publication of EP3763845B1 publication Critical patent/EP3763845B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C24/00—Alloys based on an alkali or an alkaline earth metal
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon

Definitions

  • the invention relates to a magnesium alloy.
  • the invention also relates to a method for producing a magnesium alloy.
  • magnesium alloys Due to their low density and good mechanical properties, magnesium alloys are frequently used construction alloys or
  • the object of the invention is to specify a magnesium alloy which has high strength, in particular high compressive strength, and good formability.
  • Another object of the invention is to provide a method for producing such a magnesium alloy.
  • the object is achieved according to the invention by a magnesium alloy having, in particular consisting of, (in at .-%) 15.0% to 70.0% lithium, more than 0.0% aluminum, Remainder magnesium and production-related impurities, wherein a ratio of aluminum to magnesium (in at .-%) is 1: 6 to 4: 6.
  • the basis of the invention is the knowledge that with an aforementioned alloy composition of a magnesium alloy with a corresponding proportion of lithium (Li) as well as a mandatory proportion of aluminum (Al) in a certain, aforementioned ratio range of aluminum to magnesium, a microscale microstructure or fine, in particular fine lamellar, microstructure forms in the magnesium alloy.
  • a microscale microstructure or fine, in particular fine lamellar, microstructure forms in the magnesium alloy.
  • a eutectic transformation of the magnesium alloy, which occurs with the aforementioned ratio of aluminum to magnesium is regarded as the theoretical foundation for this behavior.
  • the fine-scale microstructure is associated with high strength, in particular high compressive strength, with good formability of the magnesium alloy at the same time given the corresponding aforementioned proportions of lithium in the magnesium alloy.
  • Orientation composition or orientation line in the phase diagram is in particular a ratio of aluminum to magnesium (in atomic percent, abbreviated as atomic%) of approx. 3: 6, since with this ratio a particularly homogeneous fine-scale or homogeneous fine lamellar microstructure or Find morphology.
  • atomic% aluminum to magnesium
  • the fine, especially fine lamellar, microstructure or morphology continues to be found with varying degrees which is usually associated with different characteristics of a level of strength, in particular a level of compressive strength, as well as deformability or ductility of the magnesium alloy. Because of this special morphological behavior in the specified composition range, a magnesium alloy can thus be formed which has both high strength, in particular compressive strength, and good formability.
  • the magnesium alloy (in atom%) has 30.0% to 60.0%, in particular 40% to 50%, lithium.
  • pronounced strength and particularly pronounced formability can be achieved. This is likely to result in particular from a combination of finely structured morphology and a conversion to a body-centered cubic crystal system in the specified lithium range.
  • magnesium-based alloy denotes a magnesium alloy which, based on its alloy proportions in percent by weight (% by weight), contains magnesium as the main element or the largest alloy proportion.
  • a practicable structural alloy with very high strength properties and pronounced formability can be achieved, especially in combination with the proportions for lithium listed above.
  • the magnesium alloy (in at.%) Is 30.0% to 60.0% lithium and a ratio of aluminum to magnesium (in at.%) Of 2.5: 6 to 3.5 : 6, especially about 3: 6.
  • the magnesium alloy is more than 0.0 to 3.0 wt .-%, in particular more than 0.0 to 2.0 wt .-%, preferably more than 0.0 to 1.5 wt .-% %, Calcium (Ca).
  • the corrosion resistance is improved Magnesium alloy achievable.
  • a reduced tendency of the magnesium alloy to oxidize can thus be implemented, usually advantageously in that a stable oxidation layer is formed on a surface of the magnesium alloy.
  • a grain-refining effect in the magnesium alloy can be used or achieved through an aforementioned proportion of calcium, so that a high stability of the fine-scale structure can be achieved and the strength of the magnesium alloy can be further increased.
  • the magnesium alloy has 0.5% by weight to 1.0% by weight calcium.
  • the above-mentioned effects in the presence of calcium in the magnesium alloy are based in particular on the formation of CaO. Accordingly, it can specifically be provided that calcium, at least partially, in particular predominantly, preferably entirely, in the form of CaO, is added to the magnesium alloy as an alloy component or is contained in the magnesium alloy. This promotes a homogeneous distribution of calcium or CaO in the magnesium alloy. It is therefore particularly advantageous if the magnesium alloy contains CaO in the proportions specified above for calcium.
  • the magnesium alloy contains more than 0.0 to 3.0% by weight, preferably 1.0% by weight to 2.0% by weight, rare earth metals, in particular yttrium (Y) , having.
  • Y yttrium
  • the formation of Y 2 O 3 in the magnesium alloy is particularly relevant here. Accordingly, it can be specifically provided that yttrium, at least partially, in particular predominantly, preferably entirely, in the form of Y 2 O 3, is added to the magnesium alloy as an alloy component or is contained in the magnesium alloy. It is therefore advantageous if the magnesium alloy contains Y 2 O 3 with the aforementioned proportions for yttrium.
  • the magnesium alloy contains both calcium, in particular in the form of CaO, and rare earth metals, in particular yttrium, preferably in the form of Y 2 O 3 , in each case according to the aforementioned content ranges, with calcium in particular more than 0.0 to 1.5 wt .-% and yttrium with 1.0 wt .-% to 2.0 wt .-% has proven.
  • the magnesium alloy contains calcium and rare earth metals, in particular yttrium, with a total proportion of calcium and rare earth metals, in particular yttrium, being more than 0.0 to 3.0% by weight, preferably 1.0% by weight. -% to 2.5% by weight.
  • the compressive strength of the magnesium alloy is at least 300 MPa, in particular at least 350 MPa, preferably at least 380 MPa, particularly preferably at least 400 MPa.
  • This can be achieved with an alloy composition provided according to the invention for the magnesium alloy due to its finely structured microstructure, in particular after the magnesium alloy has been produced by casting.
  • the aforementioned values preferably apply to a maximum compressive strength, in particular to a compression limit or crush limit, of the magnesium alloy.
  • the compressive strength or maximum compressive strength or compressive limit or crush limit of the magnesium alloy can advantageously be at least 410 MPa, in particular at least 430 MPa. This can usually be achieved practically with a heat treatment, as is set out in particular below.
  • the magnesium alloy has a good aging capacity, with a strength, in particular compressive strength, and / or formability of the magnesium alloy being able to be further optimized or preferably increased by heat treatment of the magnesium alloy. It is therefore advantageously provided that a specific compressive strength, in particular a maximum specific compressive strength, of the magnesium alloy, in particular at room temperature, in an exposed state is at least 300 Nm / g, in particular at least 330 Nm / g, preferably at least 350 Nm / g.
  • the outsourced state denotes a state of the magnesium alloy after a heat treatment of the magnesium alloy has been carried out. Boundary conditions of the heat treatment that are favorable for this purpose are further explained in particular below in the context of a method for producing a magnesium alloy and can be used accordingly.
  • the specified material parameters for the magnesium alloy primarily values for compressive strength or specific compressive strength, relate in particular to a room temperature, which is usually between 20 ° C and 25 ° C, usually around 20 ° C.
  • the magnesium alloy is 18.0% by weight to 24.0% by weight, in particular 18.0% by weight to 22 Wt .-% lithium, and 15.0 wt .-% to 30.0 wt .-%, in particular 16.5 wt .-% to 28.0 wt .-% aluminum. It has also been shown here that the hardness of the magnesium alloy can be optimized or set in a targeted manner with an additional proportion of calcium, in particular in the context of a heat treatment that has been carried out.
  • the magnesium alloy also contains calcium with more than 0.0 to 2.5% by weight, in particular 0.1% by weight to 2.0% by weight, preferably 0.3% by weight to 1.5% by weight.
  • calcium can not only influence or improve corrosion resistance or oxidation tendency, but also influence the hardness of the magnesium alloy. This is particularly evident when the magnesium alloy has 18.0 wt.% To 22 wt.% Lithium and 16.5 wt.% To 28.0 wt.% Aluminum, particularly noticeable at 0.1 wt. -% to 2.0% by weight, in particular at 0.3% by weight to 1.5% by weight, calcium.
  • the hardness usually increases with increasing heat treatment time, so that a hardness of the magnesium alloy can be set depending on the duration of the heat treatment. It is favorable for high hardness if a heat treatment between 200 ° C. and 450 ° C. has a heat treatment duration of more than 1 hour, in particular more than 3 hours.
  • a composition or magnesium alloy that is easy to handle and process can be obtained if the magnesium alloy contains 20% by weight of lithium and 15.0% by weight to 30.0% by weight, in particular 16.5% by weight. to 28.0% by weight, particularly preferably 18.0% by weight to 26.0% by weight, of aluminum. This is especially true if calcium is also contained in the magnesium alloy, as stated above.
  • the mechanical properties of the magnesium alloy can be optimized for a specific application by adding further alloy elements.
  • a strength, in particular the compressive strength, of the magnesium alloy it is favorable if the magnesium alloy is 3.0% by weight to 10.0 Has wt .-% zinc.
  • An optimization of the compressive strength, in particular without particularly restricting formability, can be achieved if the magnesium alloy has 7.0% by weight to 10.0% by weight zinc.
  • a method for producing a magnesium alloy according to the invention is generally based on the fact that starting materials of the magnesium alloy are mixed and cooled starting from a liquid or partially liquid phase.
  • the magnesium alloy according to the invention or a starting material, semifinished product or component with or from the magnesium alloy can be produced in a simple manner by means of conventional casting processes, for example with die casting processes, die casting processes, continuous casting processes or permanent mold casting processes. It has proven to be particularly advantageous if the production of the magnesium alloy according to the invention includes a heat treatment in order to optimize a microstructure or morphology of the magnesium alloy with regard to strength, in particular compressive strength, or formability.
  • the further object of the invention is achieved by a method for producing a magnesium alloy according to the invention, wherein a heat treatment of the magnesium alloy is carried out in order to optimize or increase a strength, in particular compressive strength, and / or formability of the magnesium alloy. It has been shown that a heat treatment of the magnesium alloy can further optimize or increase a strength, in particular compressive strength, or deformability of the magnesium alloy, so that it can be adjusted in a targeted manner, preferably tailored to an intended use of the magnesium alloy.
  • the heat treatment is carried out at a temperature greater than 200 ° C., in particular between 200 ° C. and 450 ° C., for more than 20 minutes, in particular more than 1 hour.
  • a heat treatment at a temperature between 250 ° C. and 400 ° C., preferably between 270 ° C. and 350 ° C. has proven to be particularly suitable for a pronounced increase in strength, in particular compressive strength. It is advantageous here if the heat treatment is carried out for more than 1 hour (hour), preferably between 1 hour and 10 hours, particularly preferably between 1 hour and 6 hours, in order to adjust the strength efficiently.
  • a heat treatment between 300 ° C.
  • a starting material, semi-finished product or component is advantageously implemented with, in particular made of, a magnesium alloy according to the invention or obtainable by a method according to the invention for producing a magnesium alloy according to the invention.
  • a starting material, semi-finished product or component formed with a magnesium alloy also has an advantageously high strength, in particular compressive strength, and good formability.
  • Fig. 1 shows a schematic phase diagram representation (in at .-%) for magnesium-lithium-aluminum (Mg-Li-Al) according to a conventional ternary phase diagram configuration, with composition ranges or content ranges of alloy proportions of a magnesium alloy according to the invention being indicated.
  • the dash-dotted line A shows an orientation composition of a Mg-Li-Al alloy with a ratio of aluminum to magnesium (in at.%) Of approx.
  • a composition range (in at.%) Of 15.0% to 70.0% lithium and a ratio of aluminum to magnesium (in at.%) Of 1: 6 to 4: 6 is in Fig. 1 with a square shown with a solid line, identified by reference number 1, clearly shown.
  • a pronounced strength and particularly pronounced formability can be found in particular in a composition range (in at .-%) of 30.0% to 60.0% lithium and one Ratio of aluminum to magnesium (in at .-%) from 1: 6 to 4: 6.
  • This composition range is in Fig. 1 with a square shown with a dashed line, identified by reference number 2.
  • test series were carried out with different alloy compositions of magnesium alloys, in particular corresponding to alloy compositions defined according to the invention.
  • characteristic data of Mg-20% Li-15% Al-1% Ca-0.5% Y (in% by weight) and Mg-20% Li-24% Al-1% are representative of the aforementioned composition ranges Ca-0.5% Y (in% by weight) manufactured magnesium alloy samples are shown.
  • the magnesium alloy samples were produced by permanent mold casting, in particular magnesium alloy samples having a cylindrical shape, a diameter of 5 mm and a length of 10 mm were produced.
  • the magnesium alloy samples were subjected to compression tests at room temperature, approximately 20 ° C., and flow curves were determined as the result, which represent a yield stress, in MPa, as a function of a degree of deformation, in%.
  • Fig. 2 shows a flow stress diagram with flow curves as the result of compression tests with magnesium alloy samples made from Mg-20% Li-15% Al-1% Ca-0.5% Y (in% by weight) at room temperature. Shown are flow curves of magnesium alloy samples immediately after production of the magnesium alloy samples (as-cast), in Fig. 2 shown as solid lines, identified by reference numeral 3. In addition, flow curves of magnesium alloy samples after a heat treatment (aged) carried out of the magnesium alloy samples are shown, in Fig. 2 shown as dashed lines, identified by reference number 4. For this purpose, magnesium alloy samples were subjected to a heat treatment at 330 ° C. for 3 hours and then flow curves were determined by means of pressure tests. A clear influence of the heat treatment on the compressive strength and formability of the magnesium alloy samples can be seen, which gives the potential to optimize compressive strength and formability, especially for a later application, by means of heat treatment.
  • FIGS. 3 and 4 show scanning electron micrographs of the magnesium alloy samples made from Mg-20% Li-15% Al-1% Ca-0.5% Y (in% by weight) with different magnifications.
  • light grain boundary phases in whitish-gray
  • fine crystal structures or morphologies in an area surrounded by the grain boundary phases, in particular in a central section of this area or in the interior of the mixed crystal are evident visible in particular in Fig. 4 .
  • a very different fine structure can also be seen, especially in the vicinity of the grain boundary phases.
  • Fig. 5 shows a flow stress diagram with flow curves as the result of compression tests with magnesium alloy samples made from Mg-20% Li-15% Al-1% Ca-0.5% Y (in% by weight) at room temperature, with magnesium alloy samples after heat treatments have been carried out with different heat treatment temperatures were examined. Shown are flow curves of magnesium alloy samples which were subjected to a heat treatment at 270 ° C. for 4 hours, in Fig. 5 shown as dashed lines, denoted by reference numeral 5, and flow curves of magnesium alloy samples which were subjected to a heat treatment at 330 ° C. for 4 hours, in FIG Fig. 5 Shown as solid lines, marked with reference number 6.
  • Fig. 6 shows a flow stress diagram with flow curves as the result of compression tests with magnesium alloy samples made from Mg-20% Li-24% Al-1% Ca-0.5% Y (in% by weight) at room temperature, with magnesium alloy samples after heat treatments have been carried out at different heat treatment temperatures were examined. Shown are flow curves of magnesium alloy samples which were subjected to a heat treatment at 270 ° C. for 4 hours, in Fig. 6 shown as dashed lines, denoted by reference numeral 7, and flow curves of magnesium alloy samples comprising a Were subjected to heat treatment at 330 ° C for 4 hours, in Fig. 6 shown as solid lines, identified by reference numeral 8.
  • FIG Fig. 6 shows a flow stress diagram with flow curves as the result of compression tests with magnesium alloy samples made from Mg-20% Li-24% Al-1% Ca-0.5% Y (in% by weight) at room temperature, with magnesium alloy samples after heat treatments have been carried out at different heat treatment temperatures were examined. Shown are flow curves of magnesium alloy samples which were
  • Fig. 7 shows a hardness diagram as a result of hardness tests according to Vickers with magnesium alloy samples made of Mg-20% Li-15% Al-1% Ca-0.5% Y (in% by weight) at room temperature, about 20 ° C., with magnesium alloy samples after performed heat treatments with different heat treatment times were investigated. 330 ° C was used as the heat treatment temperature.
  • the hardness diagram shows mean values of hardnesses according to Vickers (HV 0.1) of several measurements depending on different heat treatment times t, from 0 minutes (min) to 300 minutes, of the magnesium alloy samples.
  • HV 0.1 Vickers
  • a gradual increase in hardness with a heat treatment time can be seen, with a high hardness being achievable in particular with a heat treatment time of more than 60 minutes.
  • This behavior can possibly be explained by a diffusion of calcium into the inner area of the mixed crystal.
  • a magnesium alloy according to the invention thus advantageously has both great strength and good formability, which can be optimized or preferably increased in particular by means of heat treatment.
  • the magnesium alloy according to the invention or a component with or made from the magnesium alloy according to the invention thus offers the potential to implement robust and resistant components, in particular structural components, in particular in the automotive industry, aircraft industry and / or space industry, preferably adapted to the purpose.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Powder Metallurgy (AREA)
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EP19184999.1A 2019-07-08 2019-07-08 Alliage de magnesium et son procédé de fabrication Active EP3763845B1 (fr)

Priority Applications (14)

Application Number Priority Date Filing Date Title
EP19184999.1A EP3763845B1 (fr) 2019-07-08 2019-07-08 Alliage de magnesium et son procédé de fabrication
CA3137604A CA3137604A1 (fr) 2019-07-08 2020-03-25 Alliage de magnesium et son procede de fabrication
KR1020227000723A KR20220030244A (ko) 2019-07-08 2020-03-25 마그네슘 합금 및 이의 제조 방법
CN202080046287.5A CN114026260B (zh) 2019-07-08 2020-03-25 镁合金及用于生产其的方法
US17/625,359 US20220259705A1 (en) 2019-07-08 2020-03-25 Magnesium alloy and method for producing same
JP2021567860A JP2022540542A (ja) 2019-07-08 2020-03-25 マグネシウム合金およびその製造方法
PCT/EP2020/058280 WO2021004662A1 (fr) 2019-07-08 2020-03-25 Alliage de magnésium et son procédé de fabrication
KR1020227000718A KR20220030243A (ko) 2019-07-08 2020-07-07 미세-규모 공정, 특히, 나노공정, 조직을 갖는 합금 및 이러한 합금의 제조
JP2021568980A JP2022540544A (ja) 2019-07-08 2020-07-07 微細スケールの共晶組織、具体的にはナノ共晶組織を有する合金、およびそのような合金の製造
US17/625,360 US20220267881A1 (en) 2019-07-08 2020-07-07 Alloy having fine-scale eutectic, in particular nanoeutectic, structure and production of such an alloy
EP20735621.3A EP3997251A1 (fr) 2019-07-08 2020-07-07 Alliage comprenant des structures eutectiques fines, en particulier nano-eutectiques, et production de celui-ci
CA3138658A CA3138658A1 (fr) 2019-07-08 2020-07-07 Alliage comprenant des structures eutectiques fines, en particulier nano-eutectiques, et production de celui-ci
CN202080049996.9A CN114096690A (zh) 2019-07-08 2020-07-07 具有精细尺度共晶结构，特别是纳米共晶结构的合金以及这种合金的生产
PCT/EP2020/069131 WO2021005062A1 (fr) 2019-07-08 2020-07-07 Alliage comprenant des structures eutectiques fines, en particulier nano-eutectiques, et production de celui-ci

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EP19184999.1A EP3763845B1 (fr) 2019-07-08 2019-07-08 Alliage de magnesium et son procédé de fabrication

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JP (2) JP2022540542A (fr)
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CN (2) CN114026260B (fr)
CA (2) CA3137604A1 (fr)
WO (2) WO2021004662A1 (fr)

Citations (1)

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EP3276019A1 (fr) * 2015-03-25 2018-01-31 Subaru Corporation Alliage magnésium-lithium, matériau laminé constitué de l'alliage magnésium-lithium et article traité ayant pour matériau de départ l'alliage magnésium-lithium

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GB683813A (en) * 1949-09-29 1952-12-03 Magnesium Elektron Ltd Improvements in or relating to magnesium base alloys
DE1255928B (de) * 1966-01-13 1967-12-07 Metallgesellschaft Ag Verfahren zur Erzielung eines langanhaltenden Veredelungseffektes in Aluminium-Silicium-Legierungen
DE19915276A1 (de) * 1999-04-03 2000-10-05 Volkswagen Ag Verfahren zum Herstellen einer Magnesiumlegierung durch Strangpressen und Verwendung der stranggepreßten Halbzeuge und Bauteile
UA96812C2 (ru) * 2010-01-21 2011-12-12 Юлий Викторович Мильман Литейный сплав алюминия, содержащий магний и кремний
CN104060137A (zh) * 2014-06-29 2014-09-24 应丽红 一种耐磨硅铝合金
GB201415420D0 (en) * 2014-09-01 2014-10-15 Univ Brunel A casting al-mg-zn-si based aluminium alloy for improved mechanical performance
WO2016118444A1 (fr) * 2015-01-23 2016-07-28 University Of Florida Research Foundation, Inc. Alliages atténuant et bloquant les rayonnements, procédés de fabrication de ceux-ci et articles les comprenant
EP3252181A4 (fr) * 2015-01-27 2018-06-20 Santoku Corporation Alliage de magnésium-lithium, matériau laminé et article façonné
US10403890B2 (en) * 2015-11-10 2019-09-03 Nissan Motor Co., Ltd. Negative electrode active material for electric device and electric device using the same
WO2018021360A1 (fr) * 2016-07-26 2018-02-01 株式会社三徳 Alliage de magnésium/lithium et batterie magnésium/air
CN106148786B (zh) * 2016-08-22 2018-12-18 上海交通大学 高强度铸造镁锂合金及其制备方法

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EP3276019A1 (fr) * 2015-03-25 2018-01-31 Subaru Corporation Alliage magnésium-lithium, matériau laminé constitué de l'alliage magnésium-lithium et article traité ayant pour matériau de départ l'alliage magnésium-lithium

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KR20220030243A (ko) 2022-03-10
CN114026260B (zh) 2023-06-20
CA3137604A1 (fr) 2021-01-14
CN114096690A (zh) 2022-02-25
WO2021004662A1 (fr) 2021-01-14
CA3138658A1 (fr) 2021-01-14
EP3763845B1 (fr) 2021-08-18
JP2022540544A (ja) 2022-09-16
CN114026260A (zh) 2022-02-08
EP3997251A1 (fr) 2022-05-18
JP2022540542A (ja) 2022-09-16
US20220267881A1 (en) 2022-08-25
US20220259705A1 (en) 2022-08-18
WO2021005062A1 (fr) 2021-01-14
KR20220030244A (ko) 2022-03-10

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