Effects of Alloying Elements(C, Si) and Hot-Rolling on Damping Capacity and Mechanical Properties of Fe-17%Mn Alloys

Fe-17%Mn 합금의 진동감쇠능과 기계적 성질에 미치는 합금원소(C, Si) 및 열간압연의 영향

  • Kim, J.C. (Research Institute of Measuring Technology, Woojin Inc.) ;
  • Han, D.W. (Research Institute of Measuring Technology, Woojin Inc.) ;
  • Back, J.H. (Research Institute of Measuring Technology, Woojin Inc.) ;
  • Kim, T.H. (Research Institute of Measuring Technology, Woojin Inc.) ;
  • Baik, S.H. (Research Institute of Measuring Technology, Woojin Inc.) ;
  • Lee, Y.K. (Department of Metallurgical Engineering, Yonsei University)
  • Received : 2005.01.28
  • Accepted : 2005.03.14
  • Published : 2005.03.30

Abstract

In this study, the effects of C and Si on damping capacity and mechanical properties of as-cast and as-rolled Fe-17%Mn alloys were investigated as a basic study for the purpose of the commercialization of the alloy. The $M_s$ temperature of ${\gamma}{\rightarrow}{\varepsilon}$ martensitic transformation in Fe-17%Mn alloy was decreased with increasing C and Si contents, resulting in the less volume fraction of ${\varepsilon}$ martensite. The damping capacity was also decreased with increasing alloying content because of less ${\varepsilon}$ amount and the reduction in mobility of the damping sources such as the stacking fault boundaries and ${\gamma}/{\varepsilon}$ interfaces due to the pinning effect by alloying elements. The mechanical properties of as-rolled alloys were superior to those of as-cast alloys probably because of finer ${\gamma}$ grains, larger amount of ${\varepsilon}$ martensite, and chemical homogeneity.

Keywords

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