燕丽娟,张永超,孙艳蓉,王帅,汤慧珍,葛炳辉

• 1:安徽大学物质科学与信息技术研究院

摘要(Abstract)：

通过球差校正透射电镜，对相同时效处理工艺下，变形与未变形的Al-Zn-Mg-Cu合金样品中的纳米析出相进行了形貌、尺寸的统计分析和结构的原子分辨率表征，分析了变形对Al-Zn-Mg-Cu合金时效析出相演变的影响。结果表明：变形影响后续时效过程中析出相的形貌，使得板条析出相的数量下降，圆形析出相的数量上升。此外，板条析出相的尺寸倾向于在厚度方向增加，长度方向减小。变形导致析出相结构改变，形成多块非连续的局域性的纳米畴。这可能是由于位错切割析出相后析出相部分溶解，继续时效时不同区域生长速率和生长方向改变导致的。

关键词(KeyWords)： Al-Zn-Mg-Cu合金;热处理;析出相;结构演化;变形

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52101002,11874394);; 安徽省高校协同创新计划(GXXT-2020-003)

作者(Author): 燕丽娟,张永超,孙艳蓉,王帅,汤慧珍,葛炳辉

DOI: 10.13289/j.issn.1009-6264.2024-0167

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