| Project/Area Number |
61550504
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属加工(含鋳造)
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| Research Institution | Ibaraki University |
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Principal Investigator |
IMABAYASHI Mamoru IBARAKI UNIVERSITY ・ Fuculty of Engineering ・ Professor, 工学部, 教授 (10007601)
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| Project Period (FY) |
1986 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1988: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1987: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1986: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Melting and casting of Al-Li alloys / Hydrogen content of Al-Li alloys / Hydrogen embrittlement of Al-Li alloys / アルミウニム-リチウム合金の機械的性質 / アルミニウム-リチウム合金の溶解鋳造 / アルミニウム-リチウム合金の水素含有量 / アルミニウム-リチウム合金の水素ぜい性 / アルミニウム-リチウム合金の機械的性質 / アルミニウムーリチーム合金の水素含有量 / アルミニウムーリチウム合金の溶解鋳造 / アルミニウムーリチウム合金の水素ぜい性 / アルミニウムーリチウム合金の機械的性質 / リチウムを含むアルミニウム合金 / 水素ぜい性 |
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| Research Abstract |
The relation between occluded hydrogen in Al-Li alloys and low toughness of the alloys has been investigated. Some Al-Li alloys of different Li content were molten and cast into metal mold under an atmodphere of hydrogen mixed with argon or an atmosphere of pure argon, and the ingots which contained different amount of hydrogen were prepared. These ingots were subjected to gas analyses and tensile tests. Following pieces of information have been drawn from the experiments.
1. Al-Li alloys tend to occlude larger amount of hydrogen than that are occluded in other common aluminum alloys, while their hydrogen content can be reduced to ordinary values of the other alloys by holding the melt under dry argon atmosphere over long period of time.
2. Occluded hydrogen in the Al-Li alloys during melting and casting process may induces hydrogen embrittlment of the alloys under an age hardening condition.
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