Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Evaluation of Springback Angle Change with Applying Electric Current After V-bending Test on AZX311 Magnesium Alloy and Martensitic Steel

AZX311 마그네슘 합금과 마르텐사이트 강의 V-bending 이후 전류 인가에 따른 스프링백 각도 변화 평가

  • 박주원 (서울대학교 재료공학부, 신소재공동연구소) ;
  • 정혜진 (서울대학교 재료공학부, 신소재공동연구소) ;
  • 진성우 (현대자동차) ;
  • 김문조 (한국생산기술연구원) ;
  • ;
  • 한흥남 (서울대학교 재료공학부, 신소재공동연구소)
  • Received : 2018.04.04
  • Accepted : 2018.04.20
  • Published : 2018.06.01
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Abstract

The influence of electric current on the springback characteristics of AZX311 magnesium alloy and martensitic steel after V-bending test is investigated. Various pulsed electric currents are applied into the specimens followed by a V-bending test, and the changes in the springback angle are measured. In order to evaluate not only the thermal effect but also the athermal effect of electric current on the springback angle, the temperature rises resulting from the applied electric current are measured for all test conditions. As a result, it was found that the springback is significantly decreased as the current density increases. As for the martensitic steel, since the dislocation recovery immoderately occurs at a high electric current density condition of $80A/mm^2$, the optimal current density condition should be required.

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References

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