拉/压冷变形对2A14铝合金时效强化的影响

doi:10.13251/j.issn.0254-6051.2021.03.022

金属热处理 ›› 2021, Vol. 46 ›› Issue (3): 109-112.DOI: 10.13251/j.issn.0254-6051.2021.03.022

拉/压冷变形对2A14铝合金时效强化的影响

李姚君¹, 韩振², 兰箭²

1.无锡派克新材料科技股份有限公司, 江苏无锡 214161;
2.武汉理工大学材料科学与工程学院, 湖北武汉 430070

收稿日期:2020-11-22 出版日期:2021-03-25 发布日期:2021-05-08
通讯作者: 兰箭,教授,博士,E-mail:jlan@whut.edu.cn
作者简介:李姚君(1969—),男,高级经济师,主要研究方向为金属材料塑性加工成型,E-mail:371457753@qq.com。
基金资助:
国家自然科学基金(51975439)

Effect of tensile/compressive cold deformation on strengthening of2A14 aluminum alloy after aging

Li Yaojun¹, Han Zhen², Lan Jian²

1. Wuxi Paike New Materials Technology Co., Ltd., Wuxi Jiangsu 214161, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan Hubei 430070, China

Received:2020-11-22 Online:2021-03-25 Published:2021-05-08

摘要/Abstract

摘要： 利用X射线衍射仪和DSC差热扫描量热仪进行测试,结合铝合金的析出相强化和位错强化理论模型,研究了在固溶-拉/压冷变形-时效过程中2A14铝合金强度的变化规律。结果表明:相比于压缩冷变形,拉伸冷变形引入的位错密度较大,因而位错强化作用更强;拉伸冷变形欠时效阶段(θ相析出之前)促进合金中强化相θ′相的析出,过时效阶段(θ相析出之后)抑制θ相的析出,拉伸冷变形的析出强化效果更好。经过拉伸冷变形的2A14铝合金时效强化效果更加显著。

关键词: 拉/压冷变形, 2A14铝合金, 强化, 时效

Abstract: Strength of solution treated 2A14 aluminum alloy during aging process under tensile or compressive cold deformation conditions was studied by using X-ray diffractometer and DSC differential scanning calorimetry with the help of precipitation phase strengthening and dislocation strengthening theoretical model of aluminum alloy. The results show that compared with compressive cold deformation, the dislocation density introduced by tensile cold deformation is greater, so the dislocation strengthening effect is stronger; In the under-aging stage (before θ phase precipitates) of tensile cold deformation, the precipitation of the strengthening phase θ′ phase in the alloy is promoted. In the over-aging stage (after θ phase precipitates), the precipitation of the θ phase is suppressed, and the precipitation strengthening effect of tensile cold deformation is better. The strengthening effect of the 2A14 aluminum alloy after tensile cold deformation is more significant.

Key words: tensile/compressive cold deformation, 2A14 aluminum alloy, strengthening, aging

中图分类号:

TG306

李姚君, 韩振, 兰箭. 拉/压冷变形对2A14铝合金时效强化的影响[J]. 金属热处理, 2021, 46(3): 109-112.

Li Yaojun, Han Zhen, Lan Jian. Effect of tensile/compressive cold deformation on strengthening of2A14 aluminum alloy after aging[J]. Heat Treatment of Metals, 2021, 46(3): 109-112.

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拉/压冷变形对2A14铝合金时效强化的影响

Effect of tensile/compressive cold deformation on strengthening of2A14 aluminum alloy after aging

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