固溶后冷轧变形量对2195铝锂合金组织和力学性能的影响

doi:10.12068/j.issn.1005-3026.2023.02.007

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (2): 199-205.DOI: 10.12068/j.issn.1005-3026.2023.02.007

固溶后冷轧变形量对2195铝锂合金组织和力学性能的影响

左玉波^1,2，凌放^1,2，韩友^1,2，朱庆丰^1,3

(1. 东北大学材料电磁过程研究教育部重点实验室，辽宁沈阳110819； 2. 东北大学材料科学与工程学院，辽宁沈阳110819； 3. 东北大学材料先进制备技术教育部工程研究中心，辽宁沈阳110819)

修回日期:2021-12-16 接受日期:2021-12-16 发布日期:2023-02-27
通讯作者: 左玉波
作者简介:左玉波(1976-)，男，辽宁沈阳人，东北大学副教授，博士生导师；朱庆丰(1979-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
中央高校基本科研业务费专项资金资助项目(N2109007)；辽宁省自然科学基金资助项目(2019-KF-05-03)；镇江市重点研发计划项目( GY2019004) .

Effect of Cold Rolling Deformation on Microstructure and Mechanical Properties of Solution-treated 2195 Al-Li Alloy

ZUO Yu-bo^1,2， LING Fang^1,2， HAN You^1,2， ZHU Qing-feng^1,3

1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China; 2. School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China; 3. Engineering Research Center of Advanced Materials Preparing Technology， Ministry of Education， Northeastern University， Shenyang 110819， China.

Revised:2021-12-16 Accepted:2021-12-16 Published:2023-02-27
Contact: ZHU Qing-feng
About author:-
Supported by:
-

摘要/Abstract

摘要： 对固溶后的2195铝锂合金挤压板材进行5%~25%的冷轧变形，并对变形后的板材进行了人工时效处理，通过组织分析和拉伸实验，研究了固溶后冷轧对2195铝锂合金挤压板材组织和性能的影响. 结果表明:当冷轧变形量增加到20%时，板材厚度方向局部纤维状组织之间呈45°剪切带；当冷轧变形量继续增大到25%时，剪切带出现在板材整个厚度方向上.冷轧板材经过时效处理(155℃保温28h)后，屈服强度、抗拉强度和延伸率随冷轧变形量的增加均先升高后降低. 冷轧变形量为10%时，试样时效后的屈服强度、抗拉强度和延伸率达最大值，分别为575，604MPa和13.7%.时效试样的屈强比先由未冷轧变形的90.8%增加到20%冷轧变形量的97.4%，再略降至25%冷轧变形量的97.1%.综合分析组织和力学性能，认为2195铝锂合金挤压板材固溶后的冷轧变形量应控制在10%左右.

关键词: 2195铝锂合金；固溶；冷轧变形；时效；力学性能

Abstract: The extruded and solution-treated plates of 2195 Al-Li alloy were cold rolled by the reduction of 5%~25% followed by an artificially aging process， and then the effect of cold rolling deformation on its microstructure and mechanical properties were studied through microstructure analysis and tensile test. The results show that the 45° shear bands begin to appear among some fibrous structures in the thickness direction of the plate after the reduction reaches 20%. Furthermore， the bands can be distributed in the whole thickness of the plate when the reduction increases to 25%. After aging treatment(155℃ for 28h)， the yield， tensile strength and final elongation of the cold-rolled plates firstly increase and then decrease with the reduction increase. When the reduction is 10%， the yield， tensile strength and final elongation of the plate reach their maximum values of 575MPa， 604MPa and 13.7%， respectively. After aging， the yield-tensile strength ratio of the sample increases from 90.8% to 97.4% with the reduction from 0 to 20%， and then slightly decreases to 97.1% with further increasing reduction to 25%. Therefore， for the extruded and solution-treated 2195 Al-Li alloy plate， the reduction of cold rolling should be controlled around 10%.

Key words: 2195 Al-Li alloy;solid solution; cold rolling deformation; aging; mechanical properties

中图分类号:

TG166.3

左玉波，凌放，韩友，朱庆丰. 固溶后冷轧变形量对2195铝锂合金组织和力学性能的影响[J]. 东北大学学报（自然科学版）, 2023, 44(2): 199-205.

ZUO Yu-bo， LING Fang， HAN You， ZHU Qing-feng. Effect of Cold Rolling Deformation on Microstructure and Mechanical Properties of Solution-treated 2195 Al-Li Alloy[J]. Journal of Northeastern University(Natural Science), 2023, 44(2): 199-205.

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固溶后冷轧变形量对2195铝锂合金组织和力学性能的影响

Effect of Cold Rolling Deformation on Microstructure and Mechanical Properties of Solution-treated 2195 Al-Li Alloy

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