Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

A Study on the Fatigue Crack of Material by Surface Non-Traditional Machining

표면특수가공에 따른 재료의 피로균열에 관한 연구

  • 이태연 (원주대학 동력기계과) ;
  • 이승호 (경기공업대학) ;
  • 강진식 (서울산업대학교 대학원 기계공학과)
  • Published : 2001.06.01
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Abstract

The influence of the fatigue crack propagation by shot peening was studied in this paper. Fatigue tests were carried out on the unpeened and shot peened CT specimens. The changes of mechanical properties, residual stress, fatigue fracture surface etc. by shot peening were investigated. The mechanical properties, residual stress, fatigue surface etc. by shot peening were investigated. The mechanical peened specimen improved in fatigue life up to 14% by shot peening. The reason of increase in the fatigue life was closely related with the compressive residual stress, which was 519.7MPa on surface. Another reason was the constraint on crack opening on surface region, it is due to the decrease in slope of crack propagation direction.

Keywords

References

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