Effect of post-weld heat treatment on microstructure and properties of Ti-23Al-17Nb alloy laser beam welding joints |
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| Authors: | WANG Guo-qing WU Ai-ping ZHAO Yue ZOU Gui-sheng CHEN Qiang REN Jia-lie |
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| Affiliation: | WANG Guo-qing,WU Ai-ping,ZHAO Yue,ZOU Gui-sheng,CHEN Qiang,REN Jia-lie Key Laboratory for Advanced Materials Processing Technology of the Ministry of Education,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China |
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| 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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| Keywords: | Ti-23Al-17Nb Ti3Al-based alloy laser beam welding post-weld heat treatment mechanical properties |
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