Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Similar and Dissimilar Welding Properties of Zirconium by TIG Welding

텅스텐아크용접에 의한 Zirconium의 동종 및 이종용접 특성 분석

  • Kim, Jin Yeong (Department of Materials Science and Metallurgical Engineering, Sunchon National University) ;
  • Hwang, Hyo-Woon (Department of Materials Science and Metallurgical Engineering, Sunchon National University) ;
  • Lee, Dae Hyun (Department of Materials Science and Metallurgical Engineering, Sunchon National University) ;
  • Lee, Jae Gwan (Department of Materials Science and Metallurgical Engineering, Sunchon National University) ;
  • Lee, Dong-Geun (Department of Materials Science and Metallurgical Engineering, Sunchon National University)
  • Received : 2021.06.03
  • Accepted : 2021.06.22
  • Published : 2021.07.30
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Abstract

Zirconium has excellent mechanical strength and high heat resistance and excellent corrosion resistance, and it is very important to study zirconium's dissimilar welding properties since it can be used in various applications under harsh environments. Similar welding of pure zirconium and dissimilar metal welding of pure zirconium and pure titanium were performed by TIG welding, and the welding properties were studied in association with microstructural and mechanical properties. In the Zr/Zr welded specimen, sound FZ and HAZ regions showed a basketweave microstructure composed of plate α phase. FZ region of Zr/Ti dissimilar welded specimen exhibited a maximum hardness value of 354.8 Hv, which is about three times higher than that of Ti base metal, due to the precipitation of very fine metastable ω and α phases in the beta matrix. In addition, due to the microstructural continuity in the FZ and HAZ regions, excellent elongation property of 21% was exhibited.

Keywords

Acknowledgement

본 논문은 순천대학교 교연비 사업의 연구지원으로 수행되었으며, 이에 감사드립니다.

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