固溶时效处理对Mg-4Zn-0.3Zr合金显微组织及阻尼性能的影响

doi:10.13251/j.issn.0254-6051.2023.07.017

金属热处理 ›› 2023, Vol. 48 ›› Issue (7): 97-102.DOI: 10.13251/j.issn.0254-6051.2023.07.017

固溶时效处理对Mg-4Zn-0.3Zr合金显微组织及阻尼性能的影响

朱嘉欣^1,2, 孙有平^1,2,3, 陈少机⁴, 谢尚恒^1,2, 周勇^1,2

1.广西科技大学机械与汽车工程学院, 广西柳州 545006;
2.广西土方机械协同创新中心, 广西柳州 545006;
3.广西汽车零部件与整车技术重点实验室, 广西柳州 545006;
4.联合汽车电子(柳州)有限公司, 广西柳州 545006

收稿日期:2022-12-22 修回日期:2023-05-10 出版日期:2023-07-25 发布日期:2023-09-04
通讯作者: 孙有平,教授,博士,E-mail:syptaiji@126.com
作者简介:朱嘉欣(1997—),女,硕士研究生,主要研究方向为金属材料加工, E-mail:2855155695@qq.com。
基金资助:
广西高等学校高水平创新团队项目(桂教师范[2019]52号);柳州市科技计划(2021CBA0102);广西研究生教育创新计划(YCSW2021323)

Effect of solution-aging treatment on microstructure and damping properties of Mg-4Zn-0.3Zr alloy

Zhu Jiaxin^1,2, Sun Youping^1,2,3, Xie Shangheng^1,2, Fang Dejun^1,2, Zhou Yong^1,2

1. School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou Guangxi 545006, China;
2. Guangxi Earthmoving Machinery Collaborative Innovation Center, Liuzhou Guangxi 545006, China;
3. Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Liuzhou Guangxi 545006, China;
4. Liuzhou Plant, United Automotive Electronic Systems Co., Ltd., Liuzhou Guangxi 545006, China

Received:2022-12-22 Revised:2023-05-10 Online:2023-07-25 Published:2023-09-04

摘要/Abstract

摘要： 采用光学显微镜、扫描电镜、动态热分析仪和X射线衍射仪研究了固溶时效处理对Mg-4Zn-0.3Zr合金显微组织和阻尼性能的影响。结果表明,铸态合金晶粒尺寸约121 μm,晶界粗大且有MgZn、MgZn₂和 Mg₇Zn₃相分布;固溶处理后,晶界处的MgZn、MgZn₂和Mg₇Zn₃相基本溶入基体;时效处理后,晶界处有少量的颗粒状MgZn和MgZn₂相析出。在低应变振幅区,铸态合金阻尼性能最好,在高应变振幅区,固溶态阻尼性能最好,固溶+时效态合金阻尼曲线的斜率最大;3种状态合金在低温区的阻尼峰均由晶界阻尼峰和位错阻尼峰叠加构成,固溶态和固溶+时效态合金在高温区的阻尼峰为弛豫型阻尼峰。

关键词: 固溶时效处理, 显微组织, 阻尼性能, Mg-4Zn-0.3Zr合金

Abstract: Effect of solution and aging treatment on microstructure and damping properties of Mg-4Zn-0.3Zr magnesium alloy was studied by means of optical microscope, scanning electron microscope, dynamic mechanical thermal analyzer and X-ray diffractor. The results show that grain size of the as-cast alloy is about 121 μm, the grain boundary is thick and distributed with MgZn, MgZn₂ and Mg₇Zn₃ phases. After solution treatment, MgZn, MgZn₂ and Mg₇Zn₃ phases on grain boundaries are basically dissolved into the matrix. After aging, a small amount of granular MgZn and MgZn₂ phases are precipitated on grain boundaries. In the low strain amplitude region, the damping properties of the as-cast alloy is the best, however, in the high strain amplitude region, the damping properties of solution treated alloy is the best, moreover, the slope of the damping curves of the solution treated + aged alloy is the largest. The damping peaks of the alloys with three states in the low temperature region are the superposition of grain boundary damping peaks and dislocation damping peaks. The damping peaks in the high temperature region of the solution treated and solution treated + aged alloy are relaxation damping peaks.

Key words: solution and aging treatment, microstructure, damping properties, Mg-4Zn-0.3Zr alloy

中图分类号:

TG146.2

朱嘉欣, 孙有平, 陈少机, 谢尚恒, 周勇. 固溶时效处理对Mg-4Zn-0.3Zr合金显微组织及阻尼性能的影响[J]. 金属热处理, 2023, 48(7): 97-102.

Zhu Jiaxin, Sun Youping, Xie Shangheng, Fang Dejun, Zhou Yong. Effect of solution-aging treatment on microstructure and damping properties of Mg-4Zn-0.3Zr alloy[J]. Heat Treatment of Metals, 2023, 48(7): 97-102.

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固溶时效处理对Mg-4Zn-0.3Zr合金显微组织及阻尼性能的影响

Effect of solution-aging treatment on microstructure and damping properties of Mg-4Zn-0.3Zr alloy

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