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Transformation-enhanced strength and ductility in a FeCoCrNiMn dual phase high-entropy alloy.
- Source :
-
Materials Science & Engineering: A . Apr2020, Vol. 780, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- High-entropy alloys (HEAs) are considered as promising structural materials. Usually, HEAs with face-centered cubic (FCC) structure exhibit excellent ductility but low strength, while HEAs with body-centered cubic (BCC) structure indicate relatively high fracture strength and low ductility. In this paper, a new transformable FeCoCrNiMn HEA with dual FCC and BCC phases is prepared. Under tensile loading, this HEA undergoes strong strain-hardening, exhibiting low yield strength, high ultimate tensile strength and large tensile elongation. This HEA can maintain stable plastic deformation in a wide strain region with a high constant normalized strain hardening rate, which is far different from the continuous decrease of that for the famous Cantor HEA. The strong strain-hardening capability and large tensile ductility of this HEA can be attributed to the strain-induced FCC-BCC transformation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 780
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 142423958
- Full Text :
- https://doi.org/10.1016/j.msea.2020.139182