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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.46  No.6 (2005)  >  pp.1274-1277

MATERIALS TRANSACTIONS
<<Previous article Vol.46  No.6 (2005)   pp.1274 - 1277 Next article>>

Effect of Deformation on Damping Capacity and Microstructure of Fe–22%Mn–8%Co Alloy

Young-Seob Seo1), Young-Kook Lee1) and Chong-Sool Choi2)
1) Department of Metallurgical Engineering, Yonsei University
2) Research Institute of Iron and Steel Technology, Yonsei University


Effect of deformation on damping capacity and microstructure of Fe–22%Mn–8%Co alloy has been investigated. The γ→ε stress-induced martensitic transformation occurs during deformation in the alloy. The amount of ε martensite increases rapidly up to 5% deformation, and gradually increases with further deformation. The damping capacity of the alloy exhibits a maximum at around 5% deformation, and decreases with further deformation in spite of the increase in ε martensite content. The deterioration of damping capacity beyond 5% is ascribed to the dislocations introduced during deformation, which obstruct the movement of damping sources of the alloy.


Keyword:
damping capacity, deformation, iron-manganese-cobalt, epsilon martensite

Received: February 04, 2005
Accepted: April 06, 2005 , Published online: October 18, 2005
Copyright (c) 2005 The Japan Institute of Metals

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