Temperature-dependent mechanical behavior in a novel hierarchical B2-strengthened high entropy alloy: Microscopic deformation mechanism and yield strength prediction

Tuanwei Zhang; Renlong Xiong; Hui Chang; Jinxiong Hou; Dan Zhao; Zhong Wang; Zhouzhu Mao; Tianxiang Bai; Zhiming Jiao; Jianjun Wang; Zhihua Wang

Materials & Design (Dec 2024)

Temperature-dependent mechanical behavior in a novel hierarchical B2-strengthened high entropy alloy: Microscopic deformation mechanism and yield strength prediction

Tuanwei Zhang,
Renlong Xiong,
Hui Chang,
Jinxiong Hou,
Dan Zhao,
Zhong Wang,
Zhouzhu Mao,
Tianxiang Bai,
Zhiming Jiao,
Jianjun Wang,
Zhihua Wang

Affiliations

Tuanwei Zhang: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Renlong Xiong: Hubei Provincial Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety, School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China; Corresponding authors.
Hui Chang: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Jinxiong Hou: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Dan Zhao: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Zhong Wang: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Zhouzhu Mao: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Tianxiang Bai: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Zhiming Jiao: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Jianjun Wang: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China
Zhihua Wang: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength and Structural Impact, Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, China; Corresponding authors.

Journal volume & issue: Vol. 248
p. 113488

Abstract

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Integration of twinning and hierarchical microstructure into a face-centered cubic (FCC) matrix is a novel research approach for advancing high-temperature alloys, enhancing strength without the need for costly heavy elements. Here, a three-level B2 phase was incorporated into a NiCoCrFe high-entropy alloy (HEA) matrix, offering a high strengthening effect at room temperature and a good resistance to moderate-temperature softening while preserving the low stacking fault energy of the FCC matrix. The resulting NiCoCrFeAl0.3Si0.3 HEA exhibited stable yield strength, strain hardening, and deformation twinning over a broad temperature ranging from 77 to 973 K. By establishing a yield strength model based on the various strengthening mechanisms, the study highlighted the important role of the three-level B2 phase in the exceptional mechanical properties of the alloy across a wide temperature range. These findings present a promising avenue for the advancement of high-temperature structural materials.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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