Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Residual Stress Measurement on Welded Specimen by Neutron Diffraction

중성자 회절을 이용한 용접부위의 잔류응력 측정

  • 박만진 (서울대학교 기계항공공학부대학원) ;
  • 장동영 (서울산업대 산업정보시스템공학과) ;
  • 최희동 (서울대학교 원자핵공학과)
  • Published : 2002.04.01
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Abstract

Residual stress is generated in the structures as a result of irregular elastic-plastic deformation during fabrication processes such as welding, heat treatment, and mechanical processing. There are several factors attributed to the origin of residual stresses, tensile or compressive. The stresses can be determined by destructive ways or nondestructive ways using X-ray or neutron diffraction. Although X-ray diffraction is a well established technique, it is practically limited to near-surface stresses. Neutrons penetrate easily into most materials and neutron diffraction permits non-destructive evaluation of lattice strain within the bulk of large specimens because the radiation is more deeply penetrating for metallic engineering components. This paper presented application of neutron diffraction technique to the residual stress measurement using 20 mm thick welded stainless steel plate($100{\times}100 \textrm{mm}^2$)

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References

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