Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Creep Damage Evaluation of High Temperature Material Using Small Punch Test Method

소형펀치실험법을 이용한 고온재료의 크리프 손상 평가

  • Yu, Hyo-Sun (Mechanical Engineering School, Chonbuk National University) ;
  • Lee, Song-In (Mechanical Engineering School, Chonbuk National University) ;
  • Baek, Seung-Se (Mechanical Engineering School, Chonbuk National University) ;
  • Na, Sung-Hun (Mechanical Engineering School, Chonbuk National University)
  • 유효선 (전북대학교 기계공학부) ;
  • 이송인 (전북대학교 기계공학부) ;
  • 백승세 (전북대학교 기계공학부) ;
  • 나성훈 (전북대학교 기계공학부)
  • Published : 2000.11.25
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Abstract

In this study, a small punch creep (SP-Creep) test using miniaturized specimen has been described for the development of the new creep test method for high temperature structural components such as headers and tubes of boiler, turbine casing and rotor, and reactor vessel. The SP-Creep testing technique has been applied to 1Cr-0.5Mo steel used widely as boiler header material and the creep test temperature are varied at $550^{\circ}C{\sim}600^{\circ}C$. From the experimental results, e.g. SP-Creep curve behaviors, the creep rate in steady state and creep rupture life with test temperature and load, the load exponential value(n, m), the activation energy($Q_{spc}$), the Monkman-Grant relation and the creep life assessment equation etc., it can be summarized that the SP-Creep test may be a useful test method to evaluate the creep properties of the heat resisting material such as boiler header.

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