journal article·2026-05Open access

Quantification of ε-martensite in Fe–17Mn alloy

Yeyu Huang, Yixiang Shi, Nian Shi, Hongwei Zhou, Zhengzheng Chen, Dingwen Wang, Fengmei Bai, Hugh Shortt, Peter K. Liaw

Abstract

The volume fraction of ε-martensite in a Fe-17Mn alloy was quantitatively analyzed by XRD and EBSD under different surface preparation conditions. Mechanical polishing induced martensite transformation, leading to an apparent ε-martensite fraction of about 96%. After electrolytic polishing, the surface layer was removed, yielding a reliable ε-martensite fraction of approximately 72%. The quantitative phase fraction obtained from EBSD shows a pronounced dependence on the step size. As the step size decreased, the volume fraction of ε-martensite gradually increased, however, the EBSD results consistently remained lower than the XRD values, owing to the ε-martensite embryos. This study highlights the methodology for quantification and microstructural characterization of the complex γ/ε dual-phase in fcc high-Mn alloys and high-entropy alloys with low stacking fault energy.
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Research context

OpenAlex topics: Magnetic Properties and Applications · Microstructure and Mechanical Properties of Steels · Magnetic Properties of Alloys

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