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Microstructural design and deformation behavior of a TRIP/TWIP tri-phase heterogeneous high-entropy alloy by Z.Y. You; Z.Y. Tang; F.B. Chu; L. Ma; G.F. Guan; H. Ding; R.D.K. Misra is a Engineering article available to read on EtoBox.

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In this study, a tri-phase heterogeneous high-entropy alloy (HEA) (Al9(Fe50Mn30Co10Cr10)91, at. %) exhibiting transformation- and twinning-induced plasticity (TRIP-TWIP) that overcomes the strength-ductility trade-off. The current HEA was systematically investigated the microstructure and mechanical properties under different thermo-mechanical processing (TMP). The HEA had a hierarchical microstructure of face-centered cubic (FCC), body-centered cubic (BCC), and a small content of hexagonal close-packed (HCP) phases after TMP. As regards the mechanical properties, after introducing recrystallized zone of ∼14.5 vol%, the HEA showed a strength of 1.15 GPa with total elongation of 10%. When the recrystallized fraction increased to ∼69.9 vol%, the HEA exhibited a combination of yield strength ∼489 MPa and tensile strength ∼704 MPa, while a satisfactory uniform elongation of 37% was maintained. The deformation activated multiple strengthening mechanisms, including dislocation slip, stacking faults, TRIP-TWIP effects, etc. led to a significant increase of work hardening rate in the intermediate stage of the strain. Additionally, the phase distribution and recrystallized grains morphology

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Author

Z.Y. You; Z.Y. Tang; F.B. Chu; L. Ma; G.F. Guan; H. Ding; R.D.K. Misra

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)