ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
Damping Capacity in Fe-Mn Binary Alloys
Young-Kook LeeJoong-Hwan JunChong-Sool Choi
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1997 Volume 37 Issue 10 Pages 1023-1030


The damping capacities of Fe-Mn binary alloys have been investigated in a wide range of manganese content from 5 to 30 wt%. The damping capacity increases with increasing manganese content, attains a maximum at approximately 17 wt% Mn, and decreases with further manganese content. It is suggested that the damping mechanisms of Fe-Mn alloys containing γ and ε phases are the stress-induced movement of the defects: stacking fault boundary in γ, stacking fault boundary in ε, ε martensite variant boundary, γ/ε interphase boundary. The appearance of the maximum damping capacity at around 17 wt% Mn in Fe-Mn binary system is well explained with the damping mechanisms. The contributions of the damping mechanisms to the overall damping capacities of Fe-17wt%Mn and Fe-21wt%Mn alloys are quantitatively analyzed, which indicates that ε martensite bears the major part of their damping capacities.

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