Comparative Study on Microstructure and Aluminum Distribution Between Laser Beam Welding and Electron Beam Welding of Ti?6Al?4V Alloy Plates

Hengchang Bu; Qiyu Gao; Yun Li; Feiyun Wang; Xiaohong Zhan

doi:10.1007/s12540-020-00683-z

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자료유형: 학술저널

저자정보: Hengchang Bu (Nanjing University of Aeronautics and Astronautics) Qiyu Gao (Nanjing University of Aeronautics and Astronautics) Yun Li (Nanjing University of Aeronautics and Astronautics) Feiyun Wang (Nanjing University of Aeronautics and Astronautics) Xiaohong Zhan (Nanjing University of Aeronautics and Astronautics)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.9

발행연도: 2021.9

수록면: 3,449 - 3,461 (13page)

DOI: 10.1007/s12540-020-00683-z

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Ti?6Al?4V alloy plates with a thickness of 4 mm were joined by electron beam welding (EBW) and laser beam welding(LBW). The comparison of LBW and EBW was performed according to grain morphology, microstructure, aluminum distribution,and microhardness of the joints. Results indicate that compared with LBW joint, more equiaxed grains are observedaround the central zone of the EBW joint. The microstructure in fusion zone (FZ) of EBW joint presents more uneven withobviously coarser acicular martensite α′. Moreover, the aluminum element content of EBW joint is substantially lower,which demonstrates a more significant burning loss behavior in EBW process. The lower aluminum content in the uppercenter areas of the joints is attributed to the more significant element burning loss caused by higher temperature, whereasmore uniform aluminum distribution in the upper part of the joints is ascribed to stronger convection form within the upperpart of the joint. In addition, the characteristics of convection and thermal field within the molten pool are recognized asvital factors influencing the aluminum distribution. The lower microhardness profile in FZ of the EBW joint is principallyattributed to coarser acicular martensite α′ and lower aluminum element in EBW joint.

#Electron beam welding #Laser beam welding #Titanium alloy #Microstructure #Burning loss #Microhardness

참고문헌 (46)

참고문헌 신청

C. Leyens / 2003 / Titanium and Titanium Alloys / Wiley

H. J. Rack / 2006 / Titanium alloys for biomedical applications / Mater. Sci. Eng., C 26:1269~1277

Montasser Marasy Dewidar / 2006 / Mechanical Characterization of Nano-Structured Materials Using Nanoindentation / Metals and Materials International 12(3):193~206

Yifei Zhang / 2020 / Electrochemical Polishing of Additively Manufactured Ti–6Al–4V Alloy / Metals and Materials International 26(6):783~792

K. Yonesawa / 1987 / Welding of titanium and titanium alloys / Weld. Int 1:1131~1142

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