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

来源期刊:中国有色金属学报(英文版)2010年第5期

论文作者:王国庆 吴爱萍 赵玥 邹贵生 陈强 任家烈

文章页码:732 - 739

Key words:Ti-23Al-17Nb; Ti3Al-based alloy; laser beam welding; post-weld heat treatment; mechanical properties

Abstract: 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.

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