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GOU Jian, WANG Zhijiang, HU Shengsun, TIAN Yinbao. Effects of CMT+P process and post heat treatment on microstructure and properties of TC4 component by additive manufacturing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 31-35,46. DOI: 10.12073/j.hjxb.2019400308
Citation: GOU Jian, WANG Zhijiang, HU Shengsun, TIAN Yinbao. Effects of CMT+P process and post heat treatment on microstructure and properties of TC4 component by additive manufacturing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 31-35,46. DOI: 10.12073/j.hjxb.2019400308
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Effects of CMT+P process and post heat treatment on microstructure and properties of TC4 component by additive manufacturing

  • Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China

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  • Received Date: April 07, 2019
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    • Abstract
  • CMT + P procedure was used in wire and arc additive manufacturing of TC4 titanium alloy. Aiming at inhomogeneity in microstructure and properties by heat accumulation in addictive manufacturing process, two heat treatment processes were used to improve the inhomogeneity and promote the performance of component by addictive manufacturing. The results showed that the as-built wall in a good appearance can be obtained with CMT+P procedure. When the wire feeding speed is 6 m/min and the welding torch speed is 0.3 m/min, the heat input is 313 J/mm, and the microstructure of as-built wall is continuously growing from bottom to top. The grain size for different positions of sample becomes uniform and the resistance to plastic deformation for the sample is enhanced after heat treatment. Tensile testing shows that the component has the highest tensile strength of 1 124 MPa under 600℃ and 4 h condition. The fracture analysis shows that all the fracture modes are ductile fracture.
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