金属热处理 ›› 2025, Vol. 50 ›› Issue (11): 61-65.DOI: 10.13251/j.issn.0254-6051.2025.11.009

• 材料研究 • 上一篇    下一篇

Zn添加对高镁Al-Mg-Zn-Sc合金微观结构及阻尼性能的影响

邓桂英1, 谢海燕2,3, 何克准1, 刘崇宇3   

  1. 1.广西南南铝加工有限公司 广西铝合金材料与加工重点实验室, 广西 南宁 530031;
    2.湖南鑫政科技集团有限公司, 湖南 岳阳 414600;
    3.桂林理工大学 有色金属矿产勘查与资源高效利用省部共建协同创新中心, 广西 桂林 541004
  • 收稿日期:2025-06-19 修回日期:2025-09-11 发布日期:2025-12-16
  • 通讯作者: 谢海燕,硕士,E-mail:15773055937@163.com
  • 作者简介:邓桂英(1985—),女,高级工程师,硕士,主要研究方向为铝合金加工,E-mail:vita_deng@163.com。
  • 基金资助:
    广西科技重大专项(桂科AA23023026)

Effect of Zn addition on microstructure and damping capacity of high magnesium Al-Mg-Zn-Sc alloy

Deng Guiying1, Xie Haiyan2,3, He Kezhun1, Liu Chongyu3   

  1. 1. Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys, ALG Aluminium Inc., Nanning Guangxi 530031, China;
    2. Hunan Ciezn Technology Group Co., Ltd., Yueyang Hunan 414600, China;
    3. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin Guangxi 541004, China
  • Received:2025-06-19 Revised:2025-09-11 Published:2025-12-16

摘要: 采用自然时效、人工时效和轧制后人工时效等工艺制备出具有不同显微组织的Al-7Mg-xZn-0.25Sc(x=0,1,2,3)合金。Zn添加导致Al-7Mg-xZn-0.25Sc合金在人工时效后形成Mg32(Al, Zn)49相。此外,Zn还促进Al-7Mg-xZn-0.25Sc合金在固溶处理过程中发生再结晶。轧制所引起的晶粒细化在降低Al-7Mg-xZn-0.25Sc合金界面滑动温度的同时,提高其高温阻尼值。Zn添加可有效地抑制Al-7Mg-xZn-0.25Sc合金在高温振动过程中发生晶粒粗化,进而提高该合金的阻尼稳定性。在所研究合金中,Al-7Mg-2Zn-0.25Sc合金表现出最优的阻尼性能。

关键词: 铝合金, Zn添加, 显微组织, 阻尼性能, 阻尼机理

Abstract: Al-7Mg-xZn-0.25Sc alloys (x=0, 1, 2, 3) with different microstructures were prepared via natural aging, artificial aging, and post-rolling artificial aging processes. The addition of Zn leads to the formation of Mg32(Al, Zn)49 phases in the Al-7Mg-xZn-0.25Sc alloys after artificial aging. Furthermore, Zn promotes the recrystallization of the Al-7Mg-xZn-0.25Sc alloys during the solution treatment. The grain refinement caused by rolling reduces the interfacial sliding temperature of the Al-7Mg-xZn-0.25Sc alloys while increases their high-temperature damping capacity. The addition of Zn can effectively inhibit grain coarsening of the Al-7Mg-xZn-0.25Sc alloys during high-temperature vibration, thereby improving the damping stability of the alloys. Among the studied alloys, the Al-7Mg-2Zn-0.25Sc alloy exhibits the optimal damping capacity.

Key words: Al alloy, Zn addition, microstructure, damping capacity, damping mechanism

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