Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Damping Capacities of Nonthermoelastic BCC and HCP Martensites of Fe-Mn Binary System

Fe-Mn 이원계에서 비열탄성형 BCC 마르텐사이트와 HCP 마르텐사이트의 진동감쇠능

  • Choi, C.S. (Department of Metallurgical Engineering, Yonsei University) ;
  • Kim, J.D. (Department of Metallurgical Engineering, Yonsei University) ;
  • Moon, I.G. (Division of Metals, Korea Institute of Science and Technology) ;
  • Baik, S.H. (Research Institute of Measuring Technology, Woojin OSK Crap.)
  • 최종술 (연세대학교 공과대학 금속공학과) ;
  • 김준동 (연세대학교 공과대학 금속공학과) ;
  • 문인기 (한국과학기술원 금속연구부) ;
  • 백승한 ((주)우진 계측기술연구소)
  • Published : 1991.12.31
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Abstract

The damping capacities of the nonthermoelastic bcc type lath martensite and of the nonthermoelastic hcp type thin plate martensite in Fe-Mn alloys were studied. Fe-17%Mn alloy showing the hcp type thin plate martensite was superior to Fe-4%Mn alloy having the bcc type lath martensite in damping capacity. The damping capacity of the Fe-17%Mn alloy became greater with increasing the hcp martensite volume fraction. The damping mechanism of the Fe-4%Mn alloy was well explained by the dislocation model. However, the damping mechanism of the Fe-17%Mn alloy was explained on the basis of austenite/martensite interface moving model. The two alloys showed almost same levels of tensile strength. However, the elongation was greater in the Fe-17%Mn alloy than in the Fe-4%Mn alloy, showing lower yield strength in the former than in the latter. This result was considered to be attributed to formation of stress-induced martensite during tension test.

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Acknowledgement

Supported by : 문교부