This study investigates the effect of fatigue stress on the damping capacity in a damaged Fe-22Mn-12Cr-3Ni-2Si- 4Co damping alloy under fatigue stress. α’ and ε-martensite forms by fatigue stress in the damaged Fe-22Mn-12Cr-3Ni-2Si- 4Co damping alloy under fatigue stress. The α’ and ε-martensite forms with the specific direction and surface relief, or they cross each other. With an increasing fatigue stress, the volume fraction of α’-martensite and ε-martensite increases. With an increasing fatigue stress, the damping capacity increases with an increase in the volume fraction of ε-martensite. The increase in the damping capacity in the damaged Fe-22Mn-12Cr-3Ni-2Si-4Co alloy under fatigue stress strongly affects the increase of ε-martensite formed by fatigue stress, but the damping capacity of the damaged Fe-22Mn-12Cr-3Ni-2Si-4Co damping alloy under fatigue stress is strongly controlled by a large amount of α’-martensite.

Abstract
 1. 서 론
 2. 시료 및 실험 방법
  2.1 시료
  2.2 피로손상 시험
  2.3 미세조직 관찰
  2.4 X선 회절시험
  2.5 감쇠능 측정
 3. 결과 및 고찰
  3.1 미세조직 관찰
  3.2 미세조직과 감쇠능에 미치는 응력크기의 영향
  3.3 감쇠능에 미치는 미세조직의 영향
 4. 결 론
 References

• 이금수(부경대학교 금속공학과)
• 이예나(부경대학교 재료공학과) | Ye-Na Lee (Dept. of Materials Science and Engineering, Pukyong National University)
• 남기우(부경대학교 재료공학과) | Ki-Woo Nam (Dept. of Materials Science and Engineering, Pukyong National University)
• 강창룡(부경대학교 금속공학과) | Chang-Yong Kang (Dept. of Metallurgical Engineering, Pukyong National University) Corresponding author