Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Evaluation of Residual Stress for Weldments Using Continuous Indentation Technique

연속압입시험기법을 이용한 용접부 잔류응력 평가

  • 이윤희 (서울대학교 재료공학부) ;
  • 최열 (서울대학교 재료공학부, ㈜프로틱스) ;
  • 김광호 (㈜프로틱스) ;
  • 권동일 (서울대학교 재료공학부) ;
  • 이정석 (서울대학교 재료공학부)
  • Published : 2005.09.01
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Abstract

Apparent mechanical properties in structural components can be different from the initially designed values due to the formation of the residual stress in metal forming and welding. Therefore, the evaluation of residual stress has great importance in the reliability diagnosis of structural components. A nondestructive continuous indentation technique has been proposed to evaluate various strength concerning mechanical properties from the analysis of load-depth curve. In this study, quantitative residual stress estimation on API X65 welded joints for natural gas pipeline was performed by analyzing the variation of indentation loading curve by residual stress through a new proposed theoretical model. The residual stress from the indentation method was compared with that from the saw-cutting method.

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References

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