Additive manufacturing of high-strength and ductile high entropy alloy CoCrFeNiW0.2 composites via laser powder bed fusion and post-annealing

被引：15

作者：

Ng C.K. ^{[1
]}

Bai K. ^{[2
]}

Wuu D. ^{[1
]}

Lau K.B. ^{[1
]}

Lee J.J. ^{[1
]}

Cheong A.K.H. ^{[1
]}

Wei F. ^{[1
]}

Cheng B. ^{[1
]}

Wang P. ^{[1
,3
]}

Tan D.C.C. ^{[1
]}

Zhang Y.-W. ^{[2
]}

机构：

[1] Institute of Materials Research and Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, #08–03 Innovis, Singapore

[2] Institute of High Performance Computing, Agency for Science, Technology and Research, Fusionopolis Way, #16–16 Connexis, Singapore

[3] Engineering Cluster, Singapore Institute of Technology, 10 Dover Drive, Singapore

来源：

Journal of Alloys and Compounds | 2022年 / 906卷

关键词：

Diffusion; Laser processing; Metal matrix composites; Metals and alloys; Microstructure; Powder metallurgy;

D O I：

10.1016/j.jallcom.2022.164288

中图分类号：

学科分类号：

摘要：

A CoCrFeNiW0.2 metal-matrix composite (MMC) was fabricated by laser powder bed fusion (LPBF) and post-annealing, which exhibited comparable tensile ductility (44%) and yield strength (385 MPa) to as-casted CoCrFeNiW high entropy alloys with much higher W concentration. An Integrated Computational Materials Engineering (ICME) framework coupled with thermo-kinetic simulations was built to investigate the microstructure evolution and mechanical response of the as-fabricated and post-annealed MMCs. The combination of strength and ductility of the MMC can be attributed to the synergistic combination of dislocation, solid solution and grain boundary strengthening due to the multiple roles of W in the LPBF and post-annealing processes. © 2022 Elsevier B.V.

引用

共 47 条

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