微量Zr对深冷轧制Al-Cu-Mg合金微观组织及性能的影响

doi:10.13251/j.issn.0254-6051.2023.09.029

金属热处理 ›› 2023, Vol. 48 ›› Issue (9): 174-179.DOI: 10.13251/j.issn.0254-6051.2023.09.029

微量Zr对深冷轧制Al-Cu-Mg合金微观组织及性能的影响

谢尚恒^1,2, 孙有平^1,2,3, 朱嘉欣^1,2, 方德俊^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

收稿日期:2023-04-13 修回日期:2023-07-12 出版日期:2023-09-25 发布日期:2023-10-25
通讯作者: 孙有平,教授,博士,E-mail:syptaiji@126.com
作者简介:谢尚恒(1997—),男,硕士,主要研究方向为金属材料加工,E-mail:894169019@qq.com。
基金资助:
中央引导地方科技发展专项(桂科ZY21195053);广西重点研发计划(桂科AB23026104);柳州市科技计划(2021CBA0102);广西高等学校高水平创新团队项目(桂教师范[2019]52号)

Effect of trace Zr on microstructure and mechanical properties of deep cryogenic rolled Al-Cu-Mg alloy

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

Received:2023-04-13 Revised:2023-07-12 Online:2023-09-25 Published:2023-10-25

摘要/Abstract

摘要： 采用光学显微镜(OM)、电子万能试验机、X射线衍射仪(XRD)和扫描电镜(SEM)等研究了微量Zr添加对深冷轧制Al-Cu-Mg合金板材显微组织及力学性能的影响。结果表明,微量Zr元素的添加使Al-Cu-Mg合金晶粒细化,第二相粒子尺寸减小且分布更均匀,主要为θ-Al₂Cu相。添加Zr能有效提升Al-Cu-Mg合金的力学性能,Al-Cu-Mg-Zr合金的抗拉强度、伸长率及布氏硬度分别为610 MPa、10.3%和176 HBW,相对未添加Zr的Al-Cu-Mg合金分别增加了67 MPa、2.5%和22 HBW。位错强化对Al-Cu-Mg-Zr合金强度提升的贡献显著,达到了325 MPa。此外,经深冷轧制后Zr增强了Al-Cu-Mg合金在(111)、(200)和(220)的织构极密度,但是未改变织构类型。

关键词: Al-Cu-Mg合金, Zr添加, 深冷轧制, 微观组织, 力学性能, 织构

Abstract: Effect of trace Zr addition on microstructure and mechanical properties of deep cryogenic rolled Al-Cu-Mg alloy sheet was studied by means of optical microscope (OM), electronic universal testing machine, X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that the trace Zr addition refines the Al-Cu-Mg alloy grains, and makes the size of second-phase particles reduce and more evenly distribute, mainly as the θ-Al₂Cu phase. The addition of Zr effectively improves mechanical properties of the Al-Cu-Mg alloy, the tensile strength, elongation and Brinell hardness of which are 610 MPa, 10.3% and 176 HBW, and increases by 67 MPa, 2.5% and 22 HBW relative to the Al-Cu-Mg alloy without Zr addition, respectively. The contribution of dislocation enhancement is significant to the strength enhancement of the Al-Cu-Mg-Zr alloy, reaching 325 MPa. In addition, the Zr addition enhances the texture pole density of the Al-Cu-Mg alloys in the (111), (200) and (220) crystal planes after deep cryogenic rolling, but the texture type is not changed.

Key words: Al-Cu-Mg alloy, Zr addition, deep cryogenic rolling, microstructure, mechanical properties, texture

中图分类号:

TG146.2

谢尚恒, 孙有平, 朱嘉欣, 方德俊. 微量Zr对深冷轧制Al-Cu-Mg合金微观组织及性能的影响[J]. 金属热处理, 2023, 48(9): 174-179.

Xie Shangheng, Sun Youping, Zhu Jiaxin, Fang Dejun. Effect of trace Zr on microstructure and mechanical properties of deep cryogenic rolled Al-Cu-Mg alloy[J]. Heat Treatment of Metals, 2023, 48(9): 174-179.

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微量Zr对深冷轧制Al-Cu-Mg合金微观组织及性能的影响

Effect of trace Zr on microstructure and mechanical properties of deep cryogenic rolled Al-Cu-Mg alloy

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