固溶时效处理对挤压态6082铝合金力学性能和组织的影响

doi:10.13251/j.issn.0254-6051.2021.06.017

金属热处理 ›› 2021, Vol. 46 ›› Issue (6): 82-87.DOI: 10.13251/j.issn.0254-6051.2021.06.017

固溶时效处理对挤压态6082铝合金力学性能和组织的影响

刘吉兆^1,2, 刘巍^1,2, 袁浩登^1,2, 吴远志^1,2, 叶拓^1,2, 刘伟^1,2, 邓彬^1,2

1.湖南工学院汽车零部件技术研究院, 湖南衡阳 421002;
2.湖南工学院机械工程学院, 湖南衡阳 421002

收稿日期:2021-02-02 出版日期:2021-06-25 发布日期:2021-07-21
通讯作者: 叶拓,副教授,博士,E-mail:hnuyetuo@163.com
作者简介:刘吉兆(1964—),男,教授,硕士,主要研究方向为轻量化材料制备和性能优化,E-mail:liujz080@163.com。
基金资助:
国家级大学生创新创业训练计划平台项目(S202011528013);湖南省自然科学基金(2018JJ4030,2019JJ30009,2019JJ50110);湖南省教育厅科学研究项目(20B166);衡阳市科技计划(2020jh012668,2019yj011174)

Effects of solution and aging treatment on mechanical properties and microstructure evolution of as-extruded 6082 aluminum alloy

Liu Jizhao^1,2, Liu Wei^1,2, Yuan Haodeng^1,2, Wu Yuanzhi^1,2, Ye Tuo^1,2, Liu Wei^1,2, Deng Bin^1,2

1. Research Institute of Automobile Parts Technology, Hunan Institute of Technology, Hengyang Hunan 421002, China;
2. School of Mechanical and Engineering, Hunan Institute of Technology, Hengyang Hunan 421002, China

Received:2021-02-02 Online:2021-06-25 Published:2021-07-21

摘要/Abstract

摘要： 采用拉伸试验机、光学显微镜和透射电镜等方法研究了固溶和时效处理工艺对挤压态6082铝合金力学性能和组织的影响。结果表明,经530 ℃固溶处理的试样强度高于550 ℃固溶处理的试样,经不同固溶温度处理后合金表现出不同的力学性能各向异性行为,而经时效处理后合金的屈服强度显著提升。550 ℃固溶处理的合金,晶粒明显长大。经时效处理后的试验合金中分布着大量的针状析出相,能有效阻碍位错的运动,提升材料的强度。经不同固溶+时效处理后的挤压态试验合金拉伸断口处均发现大量的韧窝,表现出韧性断裂的特征。

关键词: 固溶时效处理, 6082铝合金, 力学性能, 显微组织, 各向异性

Abstract: Effects of solution and aging treatment on mechanical properties and microstructure of as-extruded 6082 aluminum alloy were studied by using tensile testing machine, optical microscope and transmission electron microscope. The results show that the strength of the specimens solution treated at 530 ℃ is higher than that of specimens solution treated at 550 ℃, and the alloy shows different mechanical properties anisotropy after solution treatment at different temperatures, the yield strength of the alloy is significantly improved after aging treatment. The grain size of the alloy solution treated at 550 ℃ is obviously coarser. A large number of needle precipitates in the alloy are distributed after aging treatment, which can effectively hinder the movement of dislocation and enhance the strength of the alloy. A large number of dimples are found in the tensile fracture of the as-extruded alloy after different solution and aging treatments, showing the characteristics of ductile fracture.

Key words: solution and aging treatment, 6082 aluminum alloy, mechanical properties, microstructure, anisotropy

中图分类号:

TG146.2

刘吉兆, 刘巍, 袁浩登, 吴远志, 叶拓, 刘伟, 邓彬. 固溶时效处理对挤压态6082铝合金力学性能和组织的影响[J]. 金属热处理, 2021, 46(6): 82-87.

Liu Jizhao, Liu Wei, Yuan Haodeng, Wu Yuanzhi, Ye Tuo, Liu Wei, Deng Bin. Effects of solution and aging treatment on mechanical properties and microstructure evolution of as-extruded 6082 aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(6): 82-87.

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固溶时效处理对挤压态6082铝合金力学性能和组织的影响

Effects of solution and aging treatment on mechanical properties and microstructure evolution of as-extruded 6082 aluminum alloy

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