Enhancing Strength-Ductility Synergy of CoCrNi-Based Medium-Entropy Alloy Through Coherent L12 Nanoprecipitates and Grain Boundary Precipitates

Leilei Li,Kaikai Song,Qingwei Gao, Changshan Zhou,Xiaoming Liu,Yaocen Wang,Xiaojun Bai,Chongde Cao

Acta Metallurgica Sinica (English Letters)（2023）

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摘要

The L12-strengthened Co34Cr32Ni27Al4Ti3 medium-entropy alloy (MEA) with precipitations of grain boundaries has been developed through selective laser melting (SLM) followed by cold rolling and annealing, exhibiting excellent strength-ductility synergy. The as-printed alloy exhibits low yield strength (YS) of 384 MPa, ultimate tensile strength (UTS) of 453 MPa, and uniform elongation (UE) of 1.5

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关键词

Medium-entropy alloy,Selective laser melting,Precipitation,Strength,Ductility

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