Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Correlation Between M-A Constituents and Tensile Properties in the Intercritical Coarse Grained HAZ of an Ultra Low Carbon Steel

극 저탄소강의 Intercritical coarse grained HAZ에서의 M-A상과 인장특성 간의 상관관계

  • 이윤기 (한양대학교 신소재공학부) ;
  • 문준오 (한양대학교 신소재공학부) ;
  • 김상훈 (한양대학교 신소재공학부) ;
  • 이창희 (한양대학교 신소재공학부)
  • Received : 2010.02.04
  • Accepted : 2010.03.31
  • Published : 2010.06.30
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Abstract

It is well known that martensite-austenite (M-A) constituents are formed in the intercritically reheated coarse grained heat affected zone (ICCGHAZ) of a multipass weld and they act on the local brittle zone (LBZ) in the welded structures. To investigate the effect of M-A constituents on the tensile properties of ICCGHAZ, specimens with M-A constituents of different volume fraction and size were prepared through the multipass welding cycles simulated by a Gleeble simulator and then tensile test was carried out. The results indicated that finely distributed M-A constituents contributed to decrease the yield ratio, which is mainly due to the increased tensile strength.

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References

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