2050铝锂合金薄板拉伸性能及晶间腐蚀与时效的相关性

doi:10.13251/j.issn.0254-6051.2021.05.024

金属热处理 ›› 2021, Vol. 46 ›› Issue (5): 150-155.DOI: 10.13251/j.issn.0254-6051.2021.05.024

2050铝锂合金薄板拉伸性能及晶间腐蚀与时效的相关性

李昊然, 李湛琦, 汪珈逸, 叶志豪, 李劲风, 胡小清

中南大学材料科学与工程学院, 湖南长沙 410083

收稿日期:2020-10-27 出版日期:2021-05-25 发布日期:2021-07-21
通讯作者: 李劲风,教授,博士,E-mail:lijinfeng@csu.edu.cn
作者简介:李昊然(2000—),男,主要研究方向为铝锂合金热处理,E-mail:949358834@qq.com。
基金资助:
国家高技术研究发展计划(863计划)(2013AA032401);湖南省大学生创新训练计划(S2020105330994)

Effect of aging on tensile properties and intergranular corrosion sensitivity of 2050 Al-Li alloy

Li Haoran, Li Zhanqi, Wang Jiayi, Ye Zhihao, Li Jinfeng, Hu Xiaoqing

School of Materials Science and Engineering, Central South University, Changsha Hunan 410083, China

Received:2020-10-27 Online:2021-05-25 Published:2021-07-21

摘要/Abstract

摘要： 采用拉伸性能测试、浸泡腐蚀及透射电镜(TEM)观察,研究了2050铝锂合金薄板T6及T8态时效时后的拉伸性能、晶间腐蚀(IGC)及微观组织。结果表明,T8态时效2050铝锂合金强度及伸长率均明显高于T6态时效。T6及T8态时效时,合金IGC敏感性随时效延长至峰时效阶段而逐渐降低;进一步延长至过时效阶段,IGC敏感性有所增加。另外,T8态时效时IGC敏感性明显低于T6态时效。基于提高强度、伸长率及降低IGC敏感性的综合考虑,2050铝锂合金薄板适宜的时效制度为T8态峰值时效,相应合金具有最高的强度(抗拉强度529 MPa)、良好的伸长率(10%)及最低的IGC敏感性。

关键词: 铝锂合金, 拉伸性能, 晶间腐蚀, 时效

Abstract: Tensile properties, intergranular corrosion (IGC) and microstructure of 2050 Al-Li alloy sheet after T6 and T8 aging for various time were investigated through tensile property measurement, immersion corrosion and transmission electron microscope (TEM) observation. The results show that the strength and elongation of the T8 aged alloy are much higher than those of the T6 aged alloy. The IGC sensitivity decreases with the T6 and T8 aging extension from initial aging to peak-aging. Further T6 and T8 aging increases the IGC sensitivity. In addition, the IGC sensitivity under the T8 aging condition is much lower than that under the T6 aging condition. Based on the strength, elongation and IGC sensitivity, the appropriate aging for 2050 Al-Li alloy sheet is T8 peak-aging, the corresponding alloy possesses the highest strength (tensile strength 529 MPa), good elongation (10%) and the lowest IGC sensitivity.

Key words: Al-Li alloy, tensile property, intergranular corrosion, aging

中图分类号:

TG156

李昊然, 李湛琦, 汪珈逸, 叶志豪, 李劲风, 胡小清. 2050铝锂合金薄板拉伸性能及晶间腐蚀与时效的相关性[J]. 金属热处理, 2021, 46(5): 150-155.

Li Haoran, Li Zhanqi, Wang Jiayi, Ye Zhihao, Li Jinfeng, Hu Xiaoqing. Effect of aging on tensile properties and intergranular corrosion sensitivity of 2050 Al-Li alloy[J]. Heat Treatment of Metals, 2021, 46(5): 150-155.

参考文献

[1]李劲风, 郑子樵, 陈永来, 等. 铝锂合金及其在航天工业上的应用[J]. 宇航材料工艺, 2012, 42(1): 13-19.
Li Jinfeng, Zheng Ziqiao, Chen Yonglai, et al. Al-Li alloys and their application in aerospace industry[J]. Aerospace Materials and Technology, 2012, 42(1): 13-19.
[2]Rioja R J, Liu J. The evolution of Al-Li base products for aerospace and space applications[J]. Metallurgical and Materials Transactions A, 2012, 43(9): 3325-3337.
[3]朱宏伟, 陈永来, 马鹏程, 等. 2195 铝锂合金的形变热处理工艺优化[J]. 金属热处理, 2019, 44(12): 143-147.
Zhu Hongwei, Chen Yonglai, Ma Pengcheng, et al. Optimization of thermo-mechanical treatment process of 2195 Al-Li alloy[J]. Heat Treatment of Metals, 2019, 44(12): 143-147.
[4]Li J F, Birbilis N, Li C X, et al. Influence of retrogression temperature and time on the mechanical properties and exfoliation corrosion behavior of aluminium alloy AA7150[J]. Materials Characterization, 2009, 60: 1334-1341.
[5]许龙, 姚希, 李劲风, 等. 2099铝锂合金晶间腐蚀行为与时效制度的相关性[J]. 中国腐蚀与防护学报, 2014, 34(5): 419-425.
Xu Long, Yao Xi, Li Jingfeng, et al. Correlation between intergranular corrosion behavior and aging treatment of 2099 Al-Li alloy[J]. Journal of Chinese Society for Corrosion and Protection, 2014, 34(5): 419-425.
[6]Li J F, Xu L, Cai C, et al. Mechanical property and intergranular corrosion sensitivity of Zn-free and Zn-micro alloyed Al-2.7Cu-1.7Li-0.3Mg alloys[J]. Metallurgical and Materials Transactions A, 2014, 45(11): 5736-5748.
[7]叶志豪, 朱瑞华, 李劲风, 等. 一种2050铝锂合金薄板的微观组织与力学性能[J]. 稀有金属材料与工程, 2018, 47(4): 1192-1198.
Ye Zhihao, Zhu Ruihua, Li Jinfeng, et al. Microstructure and mechanical properties of a 2050 Al-Li alloy sheet[J]. Rare Metal Materials and Engineering, 2018, 47(4): 1192-1198.
[8]Lequeu Ph, Smith K P, Danielou A. Aluminum-copper-lithium alloy 2050 developed for medium to thick plate[J]. Journal of Materials Engineering and Performance, 2010, 19(6): 841-847.
[9]Li J F, Ye Z H, Liu D Y, et al. Influence of pre-deformation on aging precipitation behavior of three Al-Cu-Li alloys[J]. Acta Metallurgica Sinica (English Letters), 2017, 30(2): 133-145.
[10]Nie J F, Muddle B C. Microstructural design of high-strength aluminum alloys[J]. Journal of Phase Equilibria, 1998, 19(6): 543-551.
[11]Liu Q, Zhu R H, Liu D Y, et al. Correlation between artificial aging and intergranular corrosion sensitivity of a new Al-Cu-Li alloy sheet [J]. Materials and Corrosion, 2017, 68(1): 65-76.
[12]蔡超, 李煬, 李劲风, 等. 2A97Al-Li合金薄板时效析出与电位及晶间腐蚀的相关性研究[J]. 金属学报, 2019, 55(8): 958-966.
Cai Chao, Li Yang, Li Jinfeng, et al. Correlation between ageing precipitation, potential and intergranular corrosion of 2A97 Al-Li alloy sheet[J]. Acta Metallurgica Sinica, 2019, 55(8): 958-966.
[13]Yan Y, Peguet L, Gharbi O, et al. On the corrosion, electrochemistry and microstructure of Al-Cu-Li alloy AA2050 as a function of ageing[J]. Materialia, 2018, 1: 25-36.

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2050铝锂合金薄板拉伸性能及晶间腐蚀与时效的相关性

Effect of aging on tensile properties and intergranular corrosion sensitivity of 2050 Al-Li alloy

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