EP0250656A1 - Sous-vieillissement à basse température d'alliages contenant du lithium - Google Patents
Sous-vieillissement à basse température d'alliages contenant du lithium Download PDFInfo
- Publication number
- EP0250656A1 EP0250656A1 EP86201174A EP86201174A EP0250656A1 EP 0250656 A1 EP0250656 A1 EP 0250656A1 EP 86201174 A EP86201174 A EP 86201174A EP 86201174 A EP86201174 A EP 86201174A EP 0250656 A1 EP0250656 A1 EP 0250656A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- aluminum
- lithium
- low temperature
- alloys
- 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.)
- Withdrawn
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 8
- 229910052744 lithium Inorganic materials 0.000 title claims description 8
- 239000001996 bearing alloy Substances 0.000 title 1
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 26
- 230000032683 aging Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- 238000005275 alloying Methods 0.000 claims description 6
- 229910001148 Al-Li alloy Inorganic materials 0.000 abstract description 17
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 abstract description 17
- 239000001989 lithium alloy Substances 0.000 abstract description 15
- 239000000463 material Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 238000011282 treatment Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000011573 trace mineral Substances 0.000 description 5
- 235000013619 trace mineral Nutrition 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229940000425 combination drug Drugs 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- 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
- 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
Definitions
- the invention relates to aluminum alloys containing lithium as an alloying element, and particularly to a process for improving the fracture toughness of aluminum-lithium alloys without detracting from their strength.
- the present invention provides a method for aging aluminum-lithium alloys of various compositions at relatively low temperatures to develop a high and improved fracture toughness without reducing the strength of the alloy.
- the alloy is aged at a relatively low temperature for a relatively long time.
- This process may be generally referred to as low temperature underaging.
- the alloy can be aged at temperatures ranging from 200°F to below 300°F for a period of time ranging from 1 up to 80 or more hours.
- This low temperature aging regimen will result in an alloy having a greater fracture toughness, often on the order of 150 to 200 percent, than that of materials aged at conventional higher temperatures while maintaining an equivalent strength.
- the impurity elements iron and silicon can be present in amounts up to 0.3 and 0.5 percent, respectively. It is preferred, however, that these elements be present only in trace amounts of less than 0.10 percent. Certain trace elements such as zinc and titanium may be present in amounts up to but not to exceed 0.25 percent and 0.15 percent, respectively. Certain other trace elements such as cadmium and chromium must each be held to levels of 0.05 percent or less. If these maximums are exceeded, the desired properties of the aluminum-lithium alloy will tend to deteriorate.
- An aluminum alloy containing 2.4 percent lithium, 1 percent magnesium, 1.3 percent copper, 0.15 percent zirconium with the balance being aluminum was formulated.
- the trace elements present in the formulation constituted less than 0.25 percent of the total.
- the iron and silicon present in the formulation constituted less than 0.07 percent each of the formulation.
- the alloy was cast and homogenized at 975°F. Thereafter, the alloy was hot rolled to a thickness of 0.2 inches. The resulting sheet was then solution treated at 975°F for about 1 hour. The sheet was then quenched in water maintained at about 70°F. Thereafter, the sheet was subjected to a stretch of 1 1/2 percent of its initial length and was then cut into specimens.
- specimens were cut to a size of 0.5 inch by 2.5 inch by 0.2 inch for precrack Charpy impact tests, a known method of measuring fracture toughness.
- Other specimens prepared for tensile strength tests were 1 inch by 4 inches by 0.2 inches.
- a plurality of specimens were then aged at 350°F for 4, 8, and 16 hours; at 325°F for 8, 16, and 48 hours; at 305°F for 8 hours; at 275°F for 16 and 40 hours; and at 250°F for 40 and 72 hours.
- Specimens aged at each of the temperatures and times were then subjected to precrack Charpy impact and tensile strength tests in accordance with standard testing procedures.
- the test values of the specimens aged at a particular temperature and time were then averaged. These average test values are set forth in the graph shown in FIGURE 1.
Landscapes
- 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)
- Extrusion Of Metal (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP86201174A EP0250656A1 (fr) | 1986-07-03 | 1986-07-03 | Sous-vieillissement à basse température d'alliages contenant du lithium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP86201174A EP0250656A1 (fr) | 1986-07-03 | 1986-07-03 | Sous-vieillissement à basse température d'alliages contenant du lithium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0250656A1 true EP0250656A1 (fr) | 1988-01-07 |
Family
ID=8195759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86201174A Withdrawn EP0250656A1 (fr) | 1986-07-03 | 1986-07-03 | Sous-vieillissement à basse température d'alliages contenant du lithium |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0250656A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625858A (zh) * | 2009-09-04 | 2012-08-01 | 美铝公司 | 用于实现改进的弹道学性能的铝合金时效方法 |
| US9234266B2 (en) | 2009-01-16 | 2016-01-12 | Alcoa Inc. | Aging of aluminum alloys for improved combination of fatigue performance and strength |
| CN113981341A (zh) * | 2021-11-05 | 2022-01-28 | 西南铝业（集团）有限责任公司 | 一种高强高韧耐腐蚀2196-t8511铝锂合金挤压型材及其生产工艺 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0107334A1 (fr) * | 1982-10-05 | 1984-05-02 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Alliages d'aluminium |
| WO1985002416A1 (fr) * | 1983-11-24 | 1985-06-06 | Cegedur Société De Transformation De L'aluminium P | Alliages a base d'aluminium contenant du lithium, du magnésium et du cuivre |
| EP0149193A2 (fr) * | 1983-12-30 | 1985-07-24 | The Boeing Company | Alliage aluminium-lithium |
| EP0149194A2 (fr) * | 1983-12-30 | 1985-07-24 | The Boeing Company | Alliages aluminium-lithium |
| EP0151301A1 (fr) * | 1983-12-30 | 1985-08-14 | The Boeing Company | Alliage aluminium-lithium |
| EP0156995A1 (fr) * | 1983-12-30 | 1985-10-09 | Aluminum Company Of America | Alliage aluminium-lithium |
| EP0158571A1 (fr) * | 1984-03-15 | 1985-10-16 | Cegedur Societe De Transformation De L'aluminium Pechiney | Alliages al-cu-li-mg à très haute résistance mécanique spécifique |
-
1986
- 1986-07-03 EP EP86201174A patent/EP0250656A1/fr not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0107334A1 (fr) * | 1982-10-05 | 1984-05-02 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Alliages d'aluminium |
| WO1985002416A1 (fr) * | 1983-11-24 | 1985-06-06 | Cegedur Société De Transformation De L'aluminium P | Alliages a base d'aluminium contenant du lithium, du magnésium et du cuivre |
| EP0149193A2 (fr) * | 1983-12-30 | 1985-07-24 | The Boeing Company | Alliage aluminium-lithium |
| EP0149194A2 (fr) * | 1983-12-30 | 1985-07-24 | The Boeing Company | Alliages aluminium-lithium |
| EP0151301A1 (fr) * | 1983-12-30 | 1985-08-14 | The Boeing Company | Alliage aluminium-lithium |
| EP0156995A1 (fr) * | 1983-12-30 | 1985-10-09 | Aluminum Company Of America | Alliage aluminium-lithium |
| EP0158571A1 (fr) * | 1984-03-15 | 1985-10-16 | Cegedur Societe De Transformation De L'aluminium Pechiney | Alliages al-cu-li-mg à très haute résistance mécanique spécifique |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9234266B2 (en) | 2009-01-16 | 2016-01-12 | Alcoa Inc. | Aging of aluminum alloys for improved combination of fatigue performance and strength |
| CN102625858A (zh) * | 2009-09-04 | 2012-08-01 | 美铝公司 | 用于实现改进的弹道学性能的铝合金时效方法 |
| US8758530B2 (en) | 2009-09-04 | 2014-06-24 | Alcoa Inc. | Methods of aging aluminum alloys to achieve improved ballistics performance |
| CN102625858B (zh) * | 2009-09-04 | 2014-10-29 | 美铝公司 | 用于实现改进的弹道学性能的铝合金时效方法 |
| CN113981341A (zh) * | 2021-11-05 | 2022-01-28 | 西南铝业（集团）有限责任公司 | 一种高强高韧耐腐蚀2196-t8511铝锂合金挤压型材及其生产工艺 |
| CN113981341B (zh) * | 2021-11-05 | 2022-04-26 | 西南铝业（集团）有限责任公司 | 一种高强高韧耐腐蚀2196-t8511铝锂合金挤压型材及其生产工艺 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT NL |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19880708 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: QUIST, WILLIAM E. Inventor name: CURTIS, R. EUGENE Inventor name: NARAYANAN, G. HARI |