Effects of amount of ε martensite, carbon content and cold working on damping capacity of an Fe-17% Mn martensitic alloy

Y. K. Lee, S. H. Baik, J. C. Kim, C. S. Choi

Research output: Contribution to journalConference article

43 Citations (Scopus)

Abstract

Damping capacity of an Fe-17% Mn alloy has been studied with respect to several factors such as volume fraction of ε martensite, carbon content, and cold rolling. In the case of subzero cooling, the damping capacity of an Fe-17% Mn alloy increases with increasing ε martensite content. In case of thermal cycling, however, the damping capacity decreases with increasing ε martensite content, because the dislocations, which act as barriers to operation of damping sources, are introduced during the thermal cycling. The carbon contents above 0.06 wt.% deteriorate the damping capacity of the Fe-17% Mn alloy, which is ascribed to an interaction between damping sources and carbon atoms and to the decrease in volume fraction of ε martensite with the increase in carbon content. The damping capacity of the Fe-17% Mn alloy shows a maximum value around 10% reduction in thickness, and decreases with further deformation. The increase in damping capacity up to 10% deformation is attributed to an increase in ε martensite volume fraction with increasing deformation, and a decrease in damping capacity above the 10% deformation is ascribed to the stress-induced α′ martensite and dislocations formed during deformation, which act as barriers to operation of damping sources.

Original languageEnglish
Pages (from-to)10-16
Number of pages7
JournalJournal of Alloys and Compounds
Volume355
Issue number1-2
DOIs
Publication statusPublished - 2003 Jun 30
EventProceedings of the International Symposium on High Damping Materials 2002 - Tokyo, Japan
Duration: 2002 Aug 222002 Aug 24

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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