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Vol.45, No.7, 403 ~ 409, 2007
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| Title |
| Effects of Co and ε Martensite on the Damping Capacity of High Strength Fe-Cr-Mn-Co Alloys |
| 김주용 Joo Yong Kim , 이수민 Su Min Lee , 김익수 Ick Soo Kim , 강창룡 Chang Yong Kang , 정해룡 Hae Ryong Jung , 서촌유평 Yuhei Nishimura , 도변의견 Yoshimi Watanabe , 궁원일재 Kazuya Miyahara |
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| Abstract |
| The damping capacity was the most important factor for development of industrial apparatus and precision apparatus. In this research, we developed Fe-12Cr-22Mn alloy having alloying elements and investigated the damping property and strength. Particularly, the effects of the phases of alpha, gamma and epsilon martensite on the damping capacity at room temperature has been investigated. Various fractions of these phases were formed depending on the Co and Si contents and degree. It was found that the combination of 22Mn-4Co-0.4Si and 50% cold rolling formed the largest volume fraction of epsilon martensite phase and showed the highest damping capacity. The other phases of alpha and gamma had actually no effect on the damping capacity. It was also found that 50% clod worked Fe-12Cr-22Mn-Co-0.4Si alloy indicated the largest Vickers hardness. |
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| Key Words |
| damping property, high damping material, epsilon martensite, internal friction, deformation induced martensite |
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