Effects of interstitial carbon atoms on texture structure and mechanical properties of FeMnCoCr alloys

PLoS One. 2020 Dec 9;15(12):e0242322. doi: 10.1371/journal.pone.0242322. eCollection 2020.

Abstract

In this paper, a (Fe50Mn30Co10Cr10)100-xCx high-entropy alloy (HEA) was successfully prepared by using the vacuum arc melting method. The peak shape analysis of the X-ray diffraction patterns, the EBSD observations, and the EDS spectra of the alloys with different compositions show that the characteristics of the dendrites and the hard phase, Cr23C6, into the initial single-phase face-centered cubic (FCC) matrix becomes gradually visible as the carbon content increases from 0 to 4%. The crystal phase variations lead to a non-linear orientation of the microstructure, to a refinement of the grains, and to a higher elastic modulus. This study presents the solid saturation limit of the interstitial carbon atoms in such alloys and establishes an empirical relation between an alloy's elastic modulus and its carbon content.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alloys / chemistry*
  • Carbon / chemistry*
  • Chromium / chemistry
  • Cobalt / chemistry
  • Elastic Modulus
  • Entropy
  • Iron / chemistry
  • Manganese / chemistry
  • Materials Testing
  • X-Ray Diffraction

Substances

  • Alloys
  • Chromium
  • Cobalt
  • Manganese
  • Carbon
  • Iron

Grants and funding

This paper was funded by the National Natural Science Foundation of China (51905215) and the National College Students Innovation and Entrepreneurship Training Program of China (201910295014Z, 201810295022). Chenhao Qian is the author who received these awards. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.