Effect of post treatment on the fatigue strength of welded joint

용접부 피로강도에 미치는 후처리의 영향

  • 윤중근 (현대중공업(주) 기술개발본부 산업기술연구소) ;
  • 김현수 (현대중공업(주) 기술개발본부 산업기술연구) ;
  • 황주환 (현대중공업(주) 기술개발본부 산업기술연구) ;
  • 박동환 (현대중공업(주) 기술개발본부 산업기술연구소)
  • Published : 2004.05.01

Abstract

Effect of post treatment on the fatigue strength of a box weldment was investigated in order to improve fatigue life of the weldment. The post treatment applied were the smooth grinding of weld bead, weld toe grinding and hammer peening at the weld toe. The fatigue strength of the weldment after post treatment clearly increased, compared with that of the weldment in as-welded condition. After smooth grinding of weld bead, fatigue crack initiated at the root of the weldment, while fatigue crack initiated at the weld toe for the other methods.

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