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Phase reversion-induced heterogeneous structure in a ferrous medium-entropy alloy via cryorolling and annealing

Journal Article


Abstract


  • A processing route via cryorolling and annealing is introduced to obtain heterogeneous grain structures in a Cr15Fe55Mn20Ni10 ferrous medium-entropy alloy (FeMEA). The cryorolled FeMEA consists of high-density shear bands, deformation-induced martensite, and residual matrix structure. After short-time annealing, the heterogeneous microstructure with multi-scale grains is formed in cryorolled sheets through phase reversion and partial recrystallization, which exhibits higher yield strength (477 MPa) and fracture elongation (44.3%) compared to room-temperature rolled sheets (389 MPa and 43.9%). The better combination of strength and ductility is due to grain boundary hardening, hetero-deformation-induced hardening, and dislocation hardening.

Publication Date


  • 2023

Citation


  • Liu, S., Luo, K., Gu, H., Gao, H., Kong, C., & Yu, H. (2023). Phase reversion-induced heterogeneous structure in a ferrous medium-entropy alloy via cryorolling and annealing. Scripta Materialia, 222. doi:10.1016/j.scriptamat.2022.115004

Scopus Eid


  • 2-s2.0-85137085032

Volume


  • 222

Issue


Place Of Publication


Abstract


  • A processing route via cryorolling and annealing is introduced to obtain heterogeneous grain structures in a Cr15Fe55Mn20Ni10 ferrous medium-entropy alloy (FeMEA). The cryorolled FeMEA consists of high-density shear bands, deformation-induced martensite, and residual matrix structure. After short-time annealing, the heterogeneous microstructure with multi-scale grains is formed in cryorolled sheets through phase reversion and partial recrystallization, which exhibits higher yield strength (477 MPa) and fracture elongation (44.3%) compared to room-temperature rolled sheets (389 MPa and 43.9%). The better combination of strength and ductility is due to grain boundary hardening, hetero-deformation-induced hardening, and dislocation hardening.

Publication Date


  • 2023

Citation


  • Liu, S., Luo, K., Gu, H., Gao, H., Kong, C., & Yu, H. (2023). Phase reversion-induced heterogeneous structure in a ferrous medium-entropy alloy via cryorolling and annealing. Scripta Materialia, 222. doi:10.1016/j.scriptamat.2022.115004

Scopus Eid


  • 2-s2.0-85137085032

Volume


  • 222

Issue


Place Of Publication