Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Small Punch Creep Evaluation and Microstructure Analysis in Aged P122 Steel

P122강 열화재의 소형펀치 크리프 평가 및 미세조직 분석

  • Kim, Bum-Joon (Material Strength & Computational Bioengineering Lab, School of Mechanical Engineering, Sungkyunkwan University) ;
  • Kim, Moon-K (Material Strength & Computational Bioengineering Lab, School of Mechanical Engineering, Sungkyunkwan University) ;
  • Dung, Hoang Tien (Material Strength & Computational Bioengineering Lab, School of Mechanical Engineering, Sungkyunkwan University) ;
  • Lim, Byeong-Soo (Material Strength & Computational Bioengineering Lab, School of Mechanical Engineering, Sungkyunkwan University)
  • 김범준 (성균관대학교 기계공학부, 재료강도 및 계산생명공학 실험실) ;
  • 김문기 (성균관대학교 기계공학부, 재료강도 및 계산생명공학 실험실) ;
  • ;
  • 임병수 (성균관대학교 기계공학부, 재료강도 및 계산생명공학 실험실)
  • Received : 2009.08.10
  • Published : 2010.01.20
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Abstract

This paper investigates the influence of aging time on creep properties via a small punch creep test and evaluates the microstructural change of P122 steel at $600^{\circ}C$. The area fraction of precipitates was quantitatively analyzed to identify the relationship between the creep rupture life and precipitates was coarsening behavior of precipitates along the grain boundaries was also investigated for various aging times. It is found that this coarsening behavior led to a loss of solution hardening and rewulte in a hardness drop and a reduction of creep life.

Keywords

Acknowledgement

Supported by : 지식경제부

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