杨兴海,王俊升,薛程鹏,王硕,苏辉,张宇轩,李星星,苗以升

• 1:北京理工大学材料学院
• 2:北京理工大学前沿交叉科学研究院

摘要(Abstract)：

从热力学计算入手，分析了Al-Cu-Li系合金中温度与各物相之间的联系。基于有限元方法，分别模拟了2050合金在半连续铸造中的温度场演变和冷速，以及具有轧制织构的T34态2050合金的应力应变关系，确定了2050合金的预变形区间为7%～9%。并将上述计算结果集成至应力时效态2050合金的实际制备过程。利用室温拉伸、透射电镜表征了应力时效后2050合金的力学性能和析出相演变。结果表明，2050合金在9%的预拉伸和200℃×7 h的应力时效条件下能获得较好的强塑性匹配，屈服强度达到600 MPa以上，伸长率大于8%。

关键词(KeyWords)： 铝锂合金;相图计算;有限元;应力时效;集成计算材料工程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(52073030),国家自然科学基金区域创新联合基金重点项目(U20A20276)

作者(Author): 杨兴海,王俊升,薛程鹏,王硕,苏辉,张宇轩,李星星,苗以升

DOI: 10.13289/j.issn.1009-6264.2023-zt10

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