Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Effect of the welding residual stress redistribution on impact absorption energy

재분포된 용접잔류응력이 충격흡수에너지에 미치는 영향

  • Yang, Zhaorui (Dept. of Mechanical Engineering, Chung-Ang University) ;
  • Lee, Youngseog (Dept. of Mechanical Engineering, Chung-Ang University)
  • Received : 2015.01.07
  • Accepted : 2015.02.24
  • Published : 2015.02.28
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Abstract

Evaluation of fracture toughness of welded structures has a significant influence on the structural design. However the residual stresses is redistributed while the welded structures is cut for preparing specimens. This study investigated an effect of the welding residual stress redistribution on the impact absorption energy of Charpy specimen. SA516Gr70 steel plate by at the flux cored arc welding (FCAW) and gas tungsten arc welding(GTAW) was cutting. Specimens for Charpy impact testing were taken from the welded plate. Two material removal mechanisms (wire cutting and water jet) were used to make the specimens. Welding residual stress and redistribution residual stress were measured using the XRD (X-Ray Diffraction) method. The amount of redistribution of residual stress depends on the different material removal mechanism. Redistribution of residual stress of reduced the impact absorption energy by 15%.

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References

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