Effect of post-weld heat treatment on microstructure and properties of Ti-23Al-17Nb alloy laser beam welding joints

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 5; pp. 732 - 739
• Main Author: 王国庆 吴爱萍 赵玥 邹贵生 陈强 任家烈
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2010; Key Laboratory for Advanced Materials Processing Technology of the Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
• Subjects: 23Al; Deterioration; Ductility; Furnaces; Heat treatment; Laser beam welding; Mechanical properties; Microstructure; post-weld heat treatment; Ti 3Al-based alloy; Ti-23Al-17Nb; Titanium base alloys; 力学性能; 显微组织; 激光束; 热处理; 焊接合金; 焊接接头性能; Ti-23Al-17Nb; Ti 3Al-based alloy; laser beam welding; post-weld heat treatment; mechanical properties; Ti3Al-based alloy
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60206-5

The mechanical properties of Ti-23Al-17Nb （mole fraction,%） laser beam welding alloy joint at room temperature are comparable to that of the base materials.However,the strength and ductility of the as-welded joint deteriorate seriously after high temperature circulation.The effect of post-welded heat treatment on the microstructure and mechanical properties of the joint was investigated.The heat treatment was taken at 980 ℃ for 1.5 h,then furnace cooling and air cooling were performed separately.The results indicate that proper post-welded heat treatment improves the ductility of the joint at high temperature.