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Research on the constitutive relationship of 5A90 Aluminum-lithium alloy at hot forming temperature
Author(s): 
Pages: 68-71
Year: Issue:  3
Journal: JOURNAL OF PLASTICITY ENGINEERING

Keyword:  铝锂合金热变形单向拉伸本构方程;
Abstract: 进行了5A90铝锂合金在200℃~450℃温度范围和0.3×10-3S-1~0.2×10-1s-1应变速率范围内的单向拉伸试验.结果表明,5A90铝锂合金的流动应力随变形温度的升高而减小,随应变速率的增大而增大;而其最大延伸率的变化趋势与流动应力的相反;最佳的成形温度范围在400℃左右.通过试验数据的计算及拟合,得到了任意温度下5A90铝锂合金应力-应变-应变速率关系的本构方程.
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