Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on Advanced Small Punch Test for Evaluation of Material Degradation in Weldment Microstructures

용접부 미세조직의 재질열화 평가를 위한 Advanced Small Punch 시험에 관한 연구

  • 이동환 (전북대학교 대학원 정밀기계공학과) ;
  • 이송인 (전북대학교 기계항공시스템공학부, 자동차신기술연구센터) ;
  • 박종진 (두산중공업 기술연구원, 시스템기술연구팀) ;
  • 유효선 (전북대학교 기계항공시스템공학부, 자동차기술연구센터)
  • Published : 2003.02.01
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Abstract

This research was aimed to evaluate the material degradation with various microstructures of X20CrMoV121 steel weldment by Advanced Small Punch(ASP) test. Due to the regional limitation on constitutive structures, the minimized loading ball(${\varphi}1.5mm$) and bore diameter of lower die(${\varphi}3mm$) were designed for the ASP test. The micro-hardness test was also performed to assess the mechanical properties with artificial aging heat treatment. Material degradation was estimated by ductile-brittle transition temperature(DBTT). The results obtained from the ASP test were compared with those from conventional small punch(CSP) test and CVN impact test for several weldment microstructures. It was found that the ASP test clearly showed the microstructural dependance on the material degradation in the weldment.

Keywords

References

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