한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제23권6호
  • /
  • Pages.105-110
  • /
  • 2009
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  • 1225-0767(pISSN)
  • /
  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
권호 표지

Alloy718 마찰용접 후열처리재의 비커스 경도의 통계적 성질

Statistical Properties of Vickers Hardness of Post Weld Heat Treated Friction Welded Parts in Alloy718

  • 공유식 (부경대학교 기계공학부) ;
  • 권혁용 (부경대학교 기계공학부 대학원) ;
  • 김선진 (부경대학교 기계공학부)
  • Kong, Yu-Sik (School of Mechanical Engineering, Pukyong National University) ;
  • Kwon, Hyeok-Yong (Graduate Student, School of Mechanical Engineering, Pukyong National University) ;
  • Kim, Seon-Jin (School of Mechanical Engineering, Pukyong National University)
  • 발행 : 2009.12.31
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초록

The objective of this paper is to investigate the statistical properties of Vickers hardness (HV) for friction welded parts in a Ni-based super alloy (Alloy718). In the case of post weld heat treatment (PWHT) parts, hardness tests were repeated for three different applied loads, 100, 200, and 300 g, with a duration time of 10 seconds. The arithmetic means of the Vickers hardness in heat affected zone (HAZ) materials were smaller than those of the base metal (BM) in all of the applied loads. The coefficient of variation (COV) for the BM and HAZ decreased by increasing the applied load. The probability distribution of the Vickers hardness followed the Weibull distribution well. The distribution of the Vickers hardness was not found to be symmetric. The shape parameter and scale parameter increased by increasing the applied load at both the BM and HAZ.

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참고문헌

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