轧制态6082-T6铝合金的热压缩力学行为及微观组织分析

doi:10.13251/j.issn.0254-6051.2022.02.005

金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 26-30.DOI: 10.13251/j.issn.0254-6051.2022.02.005

轧制态6082-T6铝合金的热压缩力学行为及微观组织分析

叶拓^1,2, 何玉兵^1,2, 何文鹏^1,2, 刘巍^1,2, 袁浩登^1,2, 吴远志^1,2, 刘伟^1,2, 刘吉兆^1,2

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:2021-09-22 修回日期:2021-11-26 出版日期:2022-02-25 发布日期:2022-04-01
通讯作者: 刘吉兆,教授,E-mail:liujz080@163.com
作者简介:叶拓(1987—),男,副教授,博士,主要研究方向为汽车轻量化材料,E-mail:hnuyetuo@163.com。
基金资助:
国家级大学生创新创业训练计划平台项目(S202111528008);湖南省科技创新计划(2021RC1008);湖南省自然科学基金(2018JJ4030,2019JJ30009,2019JJ50110);湖南省教育厅科学研究项目(20B116);衡阳市科技计划(2020jh012668,2019yj011174);湖南工学院大学生创新创业训练计划(CX2020047)

Hot compression behavior and microstructure analysis of as-rolled 6082-T6 aluminum alloy

Ye Tuo^1,2, He Yubing^1,2, He Wenpeng^1,2, Liu Wei^1,2, Yuan Haodeng^1,2, Wu Yuanzhi^1,2, Liu Wei^1,2, Liu Jizhao^1,2

1. 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:2021-09-22 Revised:2021-11-26 Online:2022-02-25 Published:2022-04-01

摘要/Abstract

摘要： 采用热模拟试验机对轧制态6082-T6铝合金进行热压缩试验,分析了合金在变形温度100~400 ℃,应变速率0.01 s^-1条件下的流变应力,对不同温度热变形的微观组织进行了表征。结果表明,轧制态6082铝合金的力学性能受变形温度和轧制方向的影响。变形过程中应力呈现负的温度敏感性,即随着变形温度升高,应力不断下降。合金表现出明显的力学性能各向异性,压缩强度在与轧制方向呈0°和90°较高,45°方向强度较低。经过热压缩变形后,与轧向呈不同方向的6082-T6铝合金的晶粒组织均沿着剪切力方向发生扭曲,同时,变形温度对晶粒组织的演变影响不大。随着变形温度的升高,合金基体内的位错密度明显下降,析出相发生粗化。

关键词: 6082-T6铝合金, 热压缩, 力学性能, 微观组织

Abstract: Hot compression test of the as-rolled 6082-T6 aluminum alloy was carried out by using a thermal simulator. The flow stress of the alloy was analyzed under the condition of deformation temperature of 100-400 ℃ and strain rate of 0.01 s^-1, and the microstructure at different hot deformation temperatures was characterized. The results show that the mechanical properties of the as-rolled 6082 aluminum alloy are affected by deformation temperature and rolling direction. The stress of the alloy shows negative temperature sensitivity during deformation, that is, the higher the deformation temperature, the lower the stress. The alloy shows obvious anisotropy of mechanical properties. The compressive strength is higher at 0° and 90° to the rolling direction and lower at 45°. After hot compression deformation, the grain structure of the as-rolled 6082-T6 aluminum alloy in three directions is distorted along the direction of shear force, and the effect of deformation temperature on grain structure is slight. With the increase of deformation temperature, the dislocation density in the alloy matrix decreases obviously, and coarsening of the precipitates is observed.

Key words: 6082-T6 aluminum alloy, hot compression, mechanical properties, microstructure

中图分类号:

TG146.2

叶拓, 何玉兵, 何文鹏, 刘巍, 袁浩登, 吴远志, 刘伟, 刘吉兆. 轧制态6082-T6铝合金的热压缩力学行为及微观组织分析[J]. 金属热处理, 2022, 47(2): 26-30.

Ye Tuo, He Yubing, He Wenpeng, Liu Wei, Yuan Haodeng, Wu Yuanzhi, Liu Wei, Liu Jizhao. Hot compression behavior and microstructure analysis of as-rolled 6082-T6 aluminum alloy[J]. Heat Treatment of Metals, 2022, 47(2): 26-30.

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轧制态6082-T6铝合金的热压缩力学行为及微观组织分析

Hot compression behavior and microstructure analysis of as-rolled 6082-T6 aluminum alloy

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