Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A Study of the Heat Treatment Effect on the Fatigue Crack Growth Behavior in Dissimilar Weld Metal Joints of SA508 Low-Carbon Steel and AISI316 Austenitic Stainless Steel

SA508 저탄소강과 AISI316 오스테나이트강의 이종 용접부 피로균열 성장 거동에 미치는 열처리 영향 연구

  • Kim, Chung-Seok (Department of Materials Science and Engineering, Chosun University)
  • 김정석 (조선대학교 재료공학과)
  • Received : 2018.04.26
  • Accepted : 2018.05.04
  • Published : 2018.06.30
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Abstract

The effect of heat treatment on the fatigue crack growth behavior in welded joints between the heat-affected zone (HAZ) of SA 508 Cl.3 low-alloy steel and HAZ of AISI 316L stainless steel is investigated. When the crack propagates across SA 508 Cl.3 or AISI 316L SS and HAZ into the weldment, the fatigue crack growth rate (FCGR) in the HAZ region does not change or decrease despite the increase in stress intensity factor ${\Delta}K$. The residual stress at the HAZ region is more compressive than that at the base Δ materials and weldment. The effect of the welding residual stress on the crack growth behavior is determined by performing a residual stress relief heat treatment at $650^{\circ}C$ for 1h and subsequent furnace cooling. The FCG behavior in the HAZ region in the as-welded specimen and the residual stress relief heat-treated specimen is discussed in terms of the welding residual stress.

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References

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