Transactions of Materials and Heat Treatment

Title：Influence of solution-aging on mechanical properties for 2195 Al-Li alloy profile

Authors： Ma Kang1 Wang Qingfeng2 3 Song Jian1 Chu Guannan2 3

Unit： 1. Tianjin Long March Launch Vehicle Manufacturing Co. Ltd. 2. Harbin Institute of Technology-Weihai 3. Harbin Institute of Technology-Weihai Innovation Park Co. Ltd.

KeyWords： Al-Li alloy solution treatment aging treatment strength hardness

ClassificationCode：TG166.3

year,vol(issue):pagenumber：2023,48(2):203-209

Abstract：

2195 Al-Li alloy as a representative of the new Al-Li alloy which can be strengthened by heat treatment, it has the advantages of high specific strength, high corrosion resistance and fatigue resistance, and it is often used as a stressed structural part in the aerospace field, so it is necessary to study its heat treatment process. Therefore, the strength, elongation and hardness values of profile at different solution temperatures, different solution times, different artificial aging temperatures and different artificial aging times were obtained by the uniaxial tensile test at room temperature and the hardness test, and the influence of solution-aging parameters on the mechanical properties of 2195 Al-Li alloy profile in O state was studied. The results show that 2195 Al-Li alloy profile meets the engineering requirements by solution treatment at 520 ℃ for more than 1.5 h, and then artificial aging at an environment higher than 160 ℃ for least 24 h. The linear relationship between hardness and tensile strength values of 2195 Al-Li alloy profile is established by the least square method, and the strength value can be obtained quickly.

Funds：

山东省重大科技创新工程(2020CXGC010303); 国家自然科学基金重点项目(U1937205); 山东省重大科技创新工程(2019TSLH0103)

作者简介：马康 (1986-)，男，硕士，工程师，E-mail：wqf1826@163.com；通信作者：初冠南 (1979-)，男，博士，教授，E-mail：chuguannan@hit.edu.cn

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