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杨 静,程东海,黄继华,张 华,赵兴科,郭和平.TC4钛合金激光焊接接头组织与性能[J].稀有金属材料与工程(英文),2009,38(2):259~262.[Yang Jing,Cheng Donghai,Huang Jihua,Zhang Hua,Zhao Xingke,Guo Heping.Microstructure and Mechanical Properties of Ti-6AL-4V Joints by Laser Beam Welding[J].Rare Metal Materials and Engineering,2009,38(2):259~262.]
Microstructure and Mechanical Properties of Ti-6AL-4V Joints by Laser Beam Welding
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Received:January 25, 2008  
DOI:
Key words: Ti-6Al-4V alloy  laser beam welding  microstructure  property
Foundation item:
Author NameAffiliation
Yang Jing University of Science and Technology Beijing, Beijing 100083, China 
Cheng Donghai University of Science and Technology Beijing, Beijing 100084, China 
Huang Jihua University of Science and Technology Beijing, Beijing 100085, China 
Zhang Hua University of Science and Technology Beijing, Beijing 100086, China 
Zhao Xingke University of Science and Technology Beijing, Beijing 100087, China 
Guo Heping Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100083, China 
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Abstract:
      The microstructure of Ti-6Al-4V joints by laser beam welding with different welding parameters was studied, and the tensile properties were investigated. The microstructure of welding seam by laser beam welding consists mainly of α′ martensite phase as well as some α″ phase. By increasing the weld heat input,the distribution of martensite becomes more dispersive and glomerate due to the molten pool stiring, the welding stress and the burning loss of alloy elements. However, the welding parameters have no obviously effects on both the phase composition and the phase ratio. The tensile strength of joints is higher than basal metal when welded with reasonable parameters