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国家科委高技术课题,下达时间为1988年8月,已拨款7万元,本研究的目的是为我国发展航空航天事业提供一种高强、高韧、成形性好、重量轻的新型材料,该课题组经10个月努力,成果显著,其中超塑铝锂合重的室温性能已经达到以下水平:强度极限σ_b≥450MPa,屈服强度σ_(0.2)≥400MPa,延伸率δ≥8％。超塑性能:最大延伸率δ_(max)=1000％,M_(max)=0.7,平均延伸率δ平均=750％。
The State Science and Technology Commission high-tech project, issued in August 1988, has allocated 70,000 yuan, the purpose of this study is to provide China’s development of aerospace industry with a high strength, high toughness, good formability, light weight of new materials, After 10 months of hard working, the group has achieved remarkable results. The room temperature performance of the superplastic aluminum lithium alloy has reached the following levels: strength limit σ_b≥450MPa, yield strength σ 0.2 (0.2) ≥400MPa and elongation δ≥8%. Superplastic performance: the maximum elongation δ_ (max) = 1000%, M_ (max) = 0.7, the average elongation δ average = 750%.