陈伟,冯光明,刘亚刚,汪小锋

• 1:宁波大学冲击与安全工程教育部重点实验室
• 2:宁波力劲科技有限公司

摘要(Abstract)：

采用扫描电镜、透射电镜、显微硬度计和万能试验机等研究了Zn对金属型铸造Al-Mg-Si-Cu合金组织和力学性能的影响。利用Avrami-Johnson-Mehl方法计算了合金析出相的动力学参数并构建了析出动力学方程。结果表明：Zn元素在合金中难以形成亚稳和稳定相，但可细化铸态合金的晶粒组织；随着Zn含量的增加，铸态合金晶粒尺寸逐渐减小；尽管Zn元素在合金中并未以析出相的形式存在，但会影响合金的时效析出行为，在时效早期可形成Mg-Zn团簇，过多的Zn含量会导致析出相减少且尺寸更大；Zn有利于提高合金的硬度，但过多的Zn含量会导致T6态合金的硬度增量降低；随着Zn含量的增加，铸态合金的强度逐渐升高，伸长率先增加后减小，断裂模式均为混合型断裂。

关键词(KeyWords)： Al-Mg-Si-Cu合金;金属型铸造;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 宁波市重点研发计划暨“揭榜挂帅”项目(2023Z005,2023Z037);; 新金属材料国家重点实验室开放基金(2023-Z04)

作者(Author): 陈伟,冯光明,刘亚刚,汪小锋

DOI: 10.13289/j.issn.1009-6264.2025-0040

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