Damping mechanisms of Fe - Mn alloy with (γ + ε) dual phase structure

J. H. Jun, Young-Kook Lee, C. S. Choi

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Abstract

The objective of the present study is to propose damping mechanisms for Fe - Mn alloys containing austenite (face centred cubic) and ε martensite (hexagonal close packed), and to analyse the individual contribution of damping mechanisms to the total damping capacity of an Fe - 17 wt-%Mn alloy with respect to volume fraction of ε martensite. On the basis of substructural characteristics of γ and ε phases, it is suggested that damping mechanisms of Fe - Mn alloys with (γ + ε) dual phase structures involve stress induced movement of various boundaries such as stacking fault boundaries in austenite and ε martensite, ε martensite variant boundaries, and γ/ε interphase boundaries. The damping capacity of the Fe - 17Mn alloy increases with increasing ε martensite content. The quantitative analysis shows that in the as quenched state, the ε martensite phase is responsible for a major part of the damping capacity.

Original languageEnglish
Pages (from-to)389-392
Number of pages4
JournalMaterials Science and Technology
Volume16
Issue number4
DOIs
Publication statusPublished - 2000 Jan 1

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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