阚允,王健,卢雅琳,尤鼎闳,周东帅,百志好

• 1:江苏理工学院材料工程学院
• 2:河海大学机电工程学院
• 3:江苏省先进材料设计与增材制造重点实验室

摘要(Abstract)：

通过扫描电镜(SEM)、透射电镜(TEM)和万能拉伸试验机等研究了不同Sc含量(0、0.1和0.2 mass%)对Al-3.2Cu-1.5Li合金微观组织及力学性能的影响。结果表明：适量Sc的添加可以细化合金晶粒，添加0.2 mass%Sc的合金晶粒细化效果较为明显，热轧态和T6态合金的组织以亚结构特征为主，沿位错或亚晶界析出的细小、稳定的Al_3(Sc, Zr)/Al_3(Li, Sc, Zr)弥散相能够有效抑制再结晶。随着Sc含量的增加，合金的抗拉强度逐渐降低，伸长率先增加后降低，当Sc含量为0.1 mass%时，合金的力学性能较好，抗拉强度和伸长率分别为480.4 MPa和13.0%。

关键词(KeyWords)： Al-3.2Cu-1.5Li合金;Sc含量;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 江苏省高等学校基础科学(自然科学)研究项目(23KJB430018);; 常州市科技计划项目(CJ20220061);; 江苏省研究生科研创新计划项目(KYCX220673);; 中央高校基本科研业务费专项资金资助(B220203019)

作者(Author): 阚允,王健,卢雅琳,尤鼎闳,周东帅,百志好

DOI: 10.13289/j.issn.1009-6264.2024-0039

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