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LÜ Shixiong, CUI Qinglong, HUANG Yongxian, ZHENG Chuanqi, WANG Yang. Microstructure and mechanical properties of thick titanium alloy joint in narrow-gap TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (8): 81-84.
Citation: LÜ Shixiong, CUI Qinglong, HUANG Yongxian, ZHENG Chuanqi, WANG Yang. Microstructure and mechanical properties of thick titanium alloy joint in narrow-gap TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (8): 81-84.
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Microstructure and mechanical properties of thick titanium alloy joint in narrow-gap TIG welding

  • 1.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institure of Technology, Harbin 150001, China

  • 2.

    Qianjiang Motorcycle Co., Ltd., Wenling 317500, China

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  • Received Date: May 09, 2011
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    • Abstract
  • High-quality joint of thick TC4 titanium alloy plate was made by narrow-gap tungsten inert gas(TIG) welding with proper gas protection and welding parameters.Metallographic analysis of the resultant joints revealed the rules of grain growth and microstructure characteristics.The variation of the cooling speed resulted in different microstructures in the heataffected zone(HAZ).The tensile test showed that the average tensile strength of the joints reached 90% of that of the base metal, which was attributed to the mechanism of meshing strengthening during narrow-gap TIG welding of thick titanium alloy plate.
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