【摘 要】
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The influence of grain structure and Ce on the strength-ductility combination for aluminum-lithium alloy was investigated. The strength-ductility combination of
【机 构】
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Department of Materials Science and Engineering,Northwestern Polytechnical University,Xi′an,Shanxi 7
论文部分内容阅读
The influence of grain structure and Ce on the strength-ductility combination for aluminum-lithium alloy was investigated. The strength-ductility combination of pancake-shape unrecrystallized grains is superior to that of recrystallized grains. A significant improvement in strength-ductility combination can be achieved by adding Ce to alloy 2090. According to the research results about fracture and properties of monotonic tension for Al-Li alloys 2090 and 2090+Ce, the relationship among grain structure, strength differences between grain-within and grain boundary, stress localization degree at grain boundary and extrinsic strengthening effect was researched. The method and mechanisms of optimizing strength-ductility were discussed, including grain structure, subgrain, T1 phase, rare earth element Ce and aging procedure.
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