This study was carried out to investigate the effect of grain size on the damping capacity of the Fe-26Mn-4Co-2Al damping alloy. α’ and ε-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 α’ and ε-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 ε-martensite. Thus, the damping capacity was affected by the ε-martensite.

1. 서 론
 2. 실험 방법
  2.1 시료
  2.2 미세조직 관찰
  2.3 감쇠능 측정
 3. 실험 결과 및 고찰
  3.1 미세조직관찰
  3.2 미세조직과 감쇠능에 미치는 결정립크기의 영향
  3.3 감쇠능에 미치는 가공유기 마르텐사이트의 영향
 4. 결 론
 References

• 정규성(부경대학교 금속공학과) | Kyu-Seong Jeong
• 김도훈(부경대학교 금속공학과) | Doe-Hoon Kim
• 권순두(한국폴리텍대학교 산업설비자동화과) | Soon-Doo Kwon
• 강창룡(부경대학교 금속공학과) | Chang-Yong Kang Corresponding author