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Effect of Grain Size on the Damping Capacity of Fe-26Mn-4Co-2Al Damping Alloy

Fe-26Mn-4Co-2Al 제진합금의 감쇠능에 미치는 결정립 크기의 영향

  • Jeong, Kyu-Seong (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Kim, Doe-Hoon (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Kwon, Soon-Doo (Dept. of Industry Equipment Aution, Korea Polytechnic College) ;
  • Kang, Chang-Yong (Dept. of Metallurgical Engineering, Pukyong National University)
  • 정규성 (부경대학교 금속공학과) ;
  • 김도훈 (부경대학교 금속공학과) ;
  • 권순두 (한국폴리텍대학교 산업설비자동화과) ;
  • 강창룡 (부경대학교 금속공학과)
  • Received : 2017.12.20
  • Accepted : 2018.02.05
  • Published : 2018.03.27

Abstract

This study was carried out to investigate the effect of grain size on the damping capacity of the Fe-26Mn-4Co-2Al damping alloy. ${\alpha}^{\prime}$ and ${\varepsilon}-martensite$ were formed by cold working, and these martensites were formed with a specific direction and surface relief. With an increase in grain size, the volume fraction of ${\alpha}^{\prime}$ and ${\varepsilon}-martensite$ increased by decrement the austenite phase stability. This volume fraction more rapidly increased in cold-rolled specimen than in the specimen that was not cold-rolled. The damping capacity also increased more with the augmentation an increased grain size and more rapidly increased in cold-rolled specimen than in the specimen that was not cold rolled. The effect of grain size on the damping capacity was larger in the cold-rolled specimen than the specimen that was not cold-rolled. Damping capacity linearly increased with an increase in volume fraction of ${\varepsilon}-martensite$. Thus, the damping capacity was affected by the ${\varepsilon}-martensite$.

Keywords

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