李维,杜玉洲,郑琦,王巍,褚瑞琪

• 1:西安理工大学材料科学与工程学院

摘要(Abstract)：

通过向纯镁中添加微量Zn或Ca以诱发变形过程中动态析出并改善其力学性能。制备了Mg-3 mass%Zn、Mg-0.2 mass%Ca和Mg-3 mass%Zn-0.2 mass%Ca合金，研究了Zn和Ca添加对镁合金变形过程中动态析出行为及强塑性的影响。结果表明：在镁中单独添加Zn或Ca后经轧制变形后未观察到动态析出相，而Zn和Ca复合添加导致了球形Ca_2Mg_6Zn_3相的动态析出，Mg-Zn-Ca合金中的动态析出相可抑制再结晶晶粒长大，得到尺寸约为20μm的再结晶晶粒；轧制态Mg-Zn-Ca合金表现出了最佳的综合力学性能，其抗拉强度为246 MPa、屈服强度为225 MPa、伸长率为10.2%,这些优异的强塑性主要归因于球形动态析出相Ca_2Mg_6Zn_3、细小的动态再结晶组织以及较弱的基面织构。

关键词(KeyWords)： Mg-Zn-Ca合金;动态再结晶;动态析出;力学性能

Abstract:

Keywords:

基金项目(Foundation): 陕西省自然科学基础研究计划(2023-JC-YB-293)

作者(Author): 李维,杜玉洲,郑琦,王巍,褚瑞琪

DOI: 10.13289/j.issn.1009-6264.2025-0028

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