Results
Title

Enhanced strength and ductility in (CoCrNi)<sub>92</sub>Mo<sub>2</sub>Al<sub>6</sub> medium entropy alloy via dual heterogeneous structures.

Authors

Li, Tiancheng; Chen, Haiyang; Huang, Yubo; Hao, Qiang; Ma, Hongchuan; Zhou, Zaifeng; Li, Shilei; Wang, Yan-Dong

Abstract

In the present (CoCrNi)92Mo2Al6 medium entropy alloy (MEA), a dual heterogeneous structure is achieved by regulating the degree of recrystallization of the FCC matrix and σ phase precipitation through incomplete annealing. Compared to the alloys with single-phase FCC structure or uniform precipitation structure, this dual heterostructured MEA has superior mechanical properties by possessing the hetero-deformation-induced (HDI) hardening, precipitation strengthening and twinning-induced plasticity (TWIP) mechanism. Our research contributes to the understanding of the micromechanical behavior of heterogeneous materials and also provides a solution to the problem that precipitation increases strength at the expense of plasticity.

Subjects

FACE centered cubic structure; INHOMOGENEOUS materials; UNIFORM spaces; RECRYSTALLIZATION (Metallurgy); ALLOYS

Publication

Materials Research Letters, 2024, Vol 12, Issue 12, p895

ISSN

2166-3831

Publication type

Academic Journal

DOI

10.1080/21663831.2024.2399579