Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Thermo-Mechanical Treatment on the Damping Capacity of Alloy with Deformation Induced Martensite Transformation

가공유기 마르텐사이트 변태를 갖는 합금의 감쇠능에 미치는 가공열처리의 영향

  • Han, Hyun-Sung (Dep. of Automatic Facilities, Korea Polytechnics College Daegu Campus) ;
  • Kang, Chang-Yong (Dept. of Metallurgical Engineering, Pukyong National University)
  • 한현성 (한국폴리텍대학 대구캠퍼스 산업설비학과) ;
  • 강창룡 (부경대학교 금속공학과)
  • Received : 2018.12.11
  • Accepted : 2019.01.09
  • Published : 2019.03.27
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Abstract

This study investigates the effect of thermo-mechanical treatment on the damping capacity of the Fe-20Mn-12Cr-3Ni-3Si alloy with deformation induced martensite transformation. Dislocation, ${\alpha}^{\prime}$ and ${\varepsilon}-martensite$ are formed, and the grain size is refined by deformation and thermo-mechanical treatment. With an increasing number cycles in the thermo-mechanical treatment, the volume fraction of ${\varepsilon}-martensite$ increases and then decreases, whereas dislocation and ${\alpha}^{\prime}-martensite$ increases, and the grain size is refined. In thermo-mechanical treated specimens with five cycles, more than 10 % of the volume fraction of ${\varepsilon}-martensite$ and less than 3 % of the volume fraction of ${\alpha}^{\prime}-martensite$ are attained. Damping capacity decreases by thermo-mechanical treatment and with an increasing number of cycles of thermo-mechanical treatment, and this result shows an opposite tendency for general metal with deformation induced martensite transformation. The damping capacity of the thermo-mechanical treated damping alloy with deformation induced martensite transformation greatly affect the formation of dislocation, grain refining and ${\alpha}^{\prime}-martensite$ and then ${\varepsilon}-martensite$ formation by thermo-mechanical treatment.

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References

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