热处理对Mg-8Gd-3Y-1.5Zn-0.6Zr合金组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2022.11.008

金属热处理 ›› 2022, Vol. 47 ›› Issue (11): 54-58.DOI: 10.13251/j.issn.0254-6051.2022.11.008

热处理对Mg-8Gd-3Y-1.5Zn-0.6Zr合金组织与力学性能的影响

田凯凯¹, 李全安^1,2, 陈晓亚^1,2, 梅婉婉¹, 陈培军³, 李向宇⁴, 谭劲峰⁵

1.河南科技大学材料科学与工程学院, 河南洛阳 471023;
2.有色金属新材料与先进加工技术省部共建协同创新中心, 河南洛阳 471023;
3.洛阳晟雅镁合金科技有限公司, 河南洛阳 471921;
4.洛阳铜加工集团有限责任公司, 河南洛阳 471003;
5.中铝洛阳铜加工有限公司, 河南洛阳 471003

收稿日期:2022-06-18 修回日期:2022-09-28 出版日期:2022-11-25 发布日期:2023-01-04
通讯作者: 李全安,教授,博士,E-mail:qali@haust.edu.cn
作者简介:田凯凯(1995—),男,硕士研究生,主要研究方向为镁合金的组织与性能,E-mail:kktian99@163.com。
基金资助:
国家自然科学基金(52201119)

Effect of heat treatment on microstructure and mechanical properties of Mg-8Gd-3Y-1.5Zn-0.6Zr alloy

Tian Kaikai¹, Li Quanan^1,2, Chen Xiaoya^1,2, Mei Wanwan¹, Chen Peijun³, Li Xiangyu⁴, Tan Jinfeng⁵

1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang Henan 471023, China;
2. Provincial and Ministerial Construction of Collaborative Innovation Center for Nonferrous Metal New Materials and Advanced Processing Technology, Luoyang Henan 471023, China;
3. Luoyang Shengya Magnesium Alloy Science and Technology Co., Ltd., Luoyang Henan 471921, China;
4. Luoyang Copper (Group) Co., Ltd., Luoyang Henan 471003, China;
5. CHINALCO Luoyang Copper Co., Ltd., Luoyang Henan 471003, China

Received:2022-06-18 Revised:2022-09-28 Online:2022-11-25 Published:2023-01-04

摘要/Abstract

摘要： 采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪和万能力学试验机等研究了固溶和时效处理对Mg-8Gd-3Y-1.5Zn-0.6Zr合金显微组织和力学性能的影响。结果表明,Mg-8Gd-3Y-1.5Zn-0.6Zr合金铸态、固溶态和时效态的显微组织均由α-Mg基体、Mg₅(Gd, Y, Zn)相和LPSO结构组成;合金经固溶和时效处理后的最大抗拉强度由铸态的187.96 MPa提高到241.93 MPa,提高了28.71%,伸长率由铸态的8.48%提高到13.91%,提高了64.03%;不同热处理状态下合金的拉伸断口形貌主要以脆性断裂为主。

关键词: Mg-8Gd-3Y-1.5Zn-0.6Zr合金, 热处理, 显微组织, 力学性能

Abstract: Effect of solid solution and aging treatment on microstructure and mechanical properties of Mg-8Gd-3Y-1.5Zn-0.6Zr alloy was investigated by means of optical microscope (OM), scanning electron microscopy (SEM), X-ray diffractometer (XRD) and universal mechanics tester. The results show that the microstructure of as-cast, solid solution treated and aged Mg-8Gd-3Y-1.5Zn-0.6Zr alloy are composed of α-Mg matrix, Mg₅(Gd, Y, Zn) phase and LPSO structure. After solid solution and aging treatment, the ultimate tensile strength is increased from 187.96 MPa(as-cast) to 241.93 MPa, which is increased by 28.71%, and the elongation is increased from 8.48%(as-cast) to 13.91%, which is increased by 64.03%. The tensile fracture morphologies of the alloy under different heat treatment states are mainly brittle fracture.

Key words: Mg-8Gd-3Y-1.5Zn-0.6Zr alloy, heat treatment, microstructure, mechanical properties

中图分类号:

TG156

田凯凯, 李全安, 陈晓亚, 梅婉婉, 陈培军, 李向宇, 谭劲峰. 热处理对Mg-8Gd-3Y-1.5Zn-0.6Zr合金组织与力学性能的影响[J]. 金属热处理, 2022, 47(11): 54-58.

Tian Kaikai, Li Quanan, Chen Xiaoya, Mei Wanwan, Chen Peijun, Li Xiangyu, Tan Jinfeng. Effect of heat treatment on microstructure and mechanical properties of Mg-8Gd-3Y-1.5Zn-0.6Zr alloy[J]. Heat Treatment of Metals, 2022, 47(11): 54-58.

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热处理对Mg-8Gd-3Y-1.5Zn-0.6Zr合金组织与力学性能的影响

Effect of heat treatment on microstructure and mechanical properties of Mg-8Gd-3Y-1.5Zn-0.6Zr alloy

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