Deformation-induced grain boundary segregation in a powder-metallurgy ultrafine-grained MoNbTaTiV refractory high-entropy alloy

Qing Liu; Xiaoguang Li; Guofeng Wang; Jun Zhu; Rui Zhan; Yongkang Liu; Wei Guan; Hang Liang; Lei Cui; Yongchang Liu

Heliyon (Sep 2024)

Deformation-induced grain boundary segregation in a powder-metallurgy ultrafine-grained MoNbTaTiV refractory high-entropy alloy

Qing Liu,
Xiaoguang Li,
Guofeng Wang,
Jun Zhu,
Rui Zhan,
Yongkang Liu,
Wei Guan,
Hang Liang,
Lei Cui,
Yongchang Liu

Affiliations

Qing Liu: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang, 110043, China; National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150006, China
Xiaoguang Li: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang, 110043, China
Guofeng Wang: National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150006, China
Jun Zhu: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China
Rui Zhan: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China
Yongkang Liu: Beijing Power Machinery Research Institute, Beijing, 100071, China
Wei Guan: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; Tianjin Key Laboratory of Advanced Joining Technology, Tianjin, 300072, China; Corresponding author. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China.
Hang Liang: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; Tianjin Key Laboratory of Advanced Joining Technology, Tianjin, 300072, China; Corresponding author. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China.
Lei Cui: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; Tianjin Key Laboratory of Advanced Joining Technology, Tianjin, 300072, China; Corresponding author. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China.
Yongchang Liu: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China; Tianjin Key Laboratory of Advanced Joining Technology, Tianjin, 300072, China

Journal volume & issue: Vol. 10, no. 17
p. e37392

Abstract

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A powder-metallurgy MoNbTaTiV refractory high-entropy alloy synthesized by mechanical alloying (MA) and spark plasma sintering was subjected to hot deformations at different temperatures and strain rates. The microstructural morphologies were characterized, and component element segregation was elucidated. With grain refinement and lattice strain increase, the large inhomogeneous milled powder became refined and homogeneous after the MA. Component element segregation was observed at relatively low deformation temperatures and high strain rates. As the deformation temperature increased and the strain rate decreased, the segregation gradually disappeared, which was attributed to dislocation movement.

Published in Heliyon

ISSN: 2405-8440 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Science: Science (General); Social Sciences: Social sciences (General)
Website: https://www.cell.com/heliyon/home

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