Microstructure characterization of electron beam welded joints of Ti3Al after post-weld heat treatment
来源期刊：Rare Metals2007年第S1期
论文作者：HE Jingshan,WU Qingsheng,ZHANG Binggang,LIU Wei,and FENG Jicai State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin ,China
文章页码：242 - 245
摘 要：The effect of post-weld heat treatment on the microstructure characterization of electron beam welded（EBW） joints of Ti3Al-Nb was investigated.The results show that the microstructure of the weld is predominantly metastable,the columnar crystal metastructure of B2 phase.The microstructure morphology of the weld is significantly influenced by the method of the heat treatment.The microstructure of the weld is laminar structure（Widmanstaten structure） consisted of interphase α2 and B2 after post-weld heat treatment of 1000 ℃/2 h.The mechanism of the post-weld heat treatment makes the hardness distribution of joints homogeneous,but makes the whole joint somehow softened.
HE Jingshan,WU Qingsheng,ZHANG Binggang,LIU Wei,and FENG Jicai State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin 150001,China
摘 要：The effect of post-weld heat treatment on the microstructure characterization of electron beam welded（EBW） joints of Ti3Al-Nb was investigated.The results show that the microstructure of the weld is predominantly metastable,the columnar crystal metastructure of B2 phase.The microstructure morphology of the weld is significantly influenced by the method of the heat treatment.The microstructure of the weld is laminar structure（Widmanstaten structure） consisted of interphase α2 and B2 after post-weld heat treatment of 1000 ℃/2 h.The mechanism of the post-weld heat treatment makes the hardness distribution of joints homogeneous,but makes the whole joint somehow softened.
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