李茂华,孙佳林,陈志龙,莫家璇,卢立伟,原梅妮

• 1:湖南科技大学材料科学与工程学院
• 2:中北大学机电工程学院

摘要(Abstract)：

采用透射电镜(TEM)和高分辨透射电镜(HRTEM)研究了7055铝合金的时效强化相均匀析出行为及析出相演变过程。结果表明：在160℃单级时效时，随着时效时间从1 h延长至24 h,基体析出相逐渐增大，平均半径由2.31 nm增大至4.39 nm,晶界析出相粗化，平均长度从7.38 nm增大至20.37 nm,晶界无析出带宽化，宽度由21.36 nm增大至47.60 nm。随着单级时效时间延长，合金的强化机制由位错切过机制转化为位错绕过机制。

关键词(KeyWords)： 7055铝合金;单级时效;纳米析出相;强化机制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52174362,51975207);; 湖南省自然科学基金(2023JJ50231)

作者(Author): 李茂华,孙佳林,陈志龙,莫家璇,卢立伟,原梅妮

DOI: 10.13289/j.issn.1009-6264.2024-0023

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