田晓莹,魏健雄,闫宏,陈荣石

• 1:中国科学技术大学材料科学与工程学院
• 2:中国科学院金属研究所师昌绪先进材料创新中心
• 3:山东科技大学材料科学与工程学院

摘要(Abstract)：

采用低压金属型铸造方法制备了WE43(Mg-4.1Y-2.3Nd-1.5Gd-0.5Zr)镁合金，对其进行了热等静压处理。利用光学显微镜、扫描电镜、能谱仪和拉伸试验等分析了合金的显微组织和室温及高温下的力学性能，研究了热等静压对低压铸造WE43镁合金组织和力学性能的影响。结果表明：低压铸造得到的WE43合金晶粒细小，时效态合金的屈服强度为(197.7±1.2) MPa、抗拉强度为(287.0±12.0) MPa、断后伸长率为(6.7±3.1)%。热等静压显著提高了合金的抗拉强度与塑性，经过热等静压之后，时效态合金的屈服强度为(199.0±2.0) MPa、抗拉强度为(306.7±7.8) MPa、断后伸长率为(8.0±1.7)%。由低压铸造-热等静压工艺制备的WE43合金在室温至250℃范围内表现出优异的力学性能，其原因是合金具有细小的晶粒组织以及消除了缩松缩孔。

关键词(KeyWords)： WE43镁合金;热等静压;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(5227110701193,51701218);; 山东省自然科学基金(ZR2021ME241);; 辽宁省自然科学基金(2020-MS-004);; 国家重点研发计划(2016YFB0301104)

作者(Author): 田晓莹,魏健雄,闫宏,陈荣石

DOI: 10.13289/j.issn.1009-6264.2023-0113

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