TY - JOUR
T1 - Novel B2-strengthening Ni–Co–Cr–Al medium-entropy alloys with prominent mechanical performance
AU - Zhou, Kexuan
AU - Wang, Zhijun
AU - Chai, Zishu
AU - Jia, Yuhao
AU - Zhu, Chao
AU - Xia, Linfei
AU - Li, Junjie
AU - Wang, Jincheng
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/4/18
Y1 - 2022/4/18
N2 - High-/medium-entropy alloys (H/MEAs) with multiple principal elements and promising performance have opened up an unprecedented multi-dimensional compositional space for exploring novel materials. Here, we report a novel B2-strengthening Ni–Co–Cr–Al medium-entropy alloy system with a better combination of strength and ductility. Through simple thermomechanical processing, gigapascal yield strength (∼1 GPa) and ultimate strength (∼1.5 GPa) combined with excellent uniform elongation (∼22%) were achieved. This excellent strength-ductility synergy resulted from the partial recrystallization combined with considerable fine B2 precipitates, and annealing twins in this dual-phase Al13 MEA. This work further broadens material design and optimization space and offers a paradigm for developing heterogeneous microstructures in dual-phase MEAs through alloying and regulating recrystallization and precipitation behaviors.
AB - High-/medium-entropy alloys (H/MEAs) with multiple principal elements and promising performance have opened up an unprecedented multi-dimensional compositional space for exploring novel materials. Here, we report a novel B2-strengthening Ni–Co–Cr–Al medium-entropy alloy system with a better combination of strength and ductility. Through simple thermomechanical processing, gigapascal yield strength (∼1 GPa) and ultimate strength (∼1.5 GPa) combined with excellent uniform elongation (∼22%) were achieved. This excellent strength-ductility synergy resulted from the partial recrystallization combined with considerable fine B2 precipitates, and annealing twins in this dual-phase Al13 MEA. This work further broadens material design and optimization space and offers a paradigm for developing heterogeneous microstructures in dual-phase MEAs through alloying and regulating recrystallization and precipitation behaviors.
KW - Mechanical performance
KW - Medium-entropy alloy
KW - Microstructure evolution
KW - Ni–Co–Cr–Al
KW - Partially recrystallization
UR - http://www.scopus.com/inward/record.url?scp=85125931372&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2022.142856
DO - 10.1016/j.msea.2022.142856
M3 - 文章
AN - SCOPUS:85125931372
SN - 0921-5093
VL - 840
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
M1 - 142856
ER -