Strong yet ductile eutectic high-entropy FCC/Laves composite fabricated by powder plasma arc additive manufacturing: Mechanical property, microstructure evolution, and constitutive description over a wide range of temperatures and strain rates

Hongxu Guo; Jianjun Wang; Xiangxiang Tu; Xizhang Chen; Shengguo Ma; Dan Zhao; Zhiming Jiao; Tuanwei Zhang; Ruifeng Wang; Zhihua Wang

Journal of Materials Research and Technology (Jan 2024)

Strong yet ductile eutectic high-entropy FCC/Laves composite fabricated by powder plasma arc additive manufacturing: Mechanical property, microstructure evolution, and constitutive description over a wide range of temperatures and strain rates

Hongxu Guo,
Jianjun Wang,
Xiangxiang Tu,
Xizhang Chen,
Shengguo Ma,
Dan Zhao,
Zhiming Jiao,
Tuanwei Zhang,
Ruifeng Wang,
Zhihua Wang

Affiliations

Hongxu Guo: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China
Jianjun Wang: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Corresponding author. Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China.
Xiangxiang Tu: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China
Xizhang Chen: School of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China
Shengguo Ma: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China
Dan Zhao: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China
Zhiming Jiao: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China
Tuanwei Zhang: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China
Ruifeng Wang: School of Astronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR China
Zhihua Wang: Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China; Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China

Journal volume & issue: Vol. 28
pp. 3093 – 3109

Abstract

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To enhance the strength and toughness of metallic materials simultaneously over a wide range of temperatures and strain rates, a eutectic high-entropy FCC/Laves composite with a heterogeneous initial microstructure was fabricated by powder plasma arc additive manufacturing. The mechanical behavior of the composite over a wide range of temperatures and strain rates was tested with the aid of an electronic universal testing machine and an improved Split Hopkinson pressure bar. The high-entropy FCC/Laves composite possesses a unique combination of strength and ductility over the selected temperature and strain rate ranges due to the in situ composite nature with both soft high-entropy FCC phase and hard high-entropy Laves phase. Complicated thermal viscoplastic behavior is presented. To reveal the mechanisms of the complicated thermal viscoplastic behavior, microstructure evolution was characterized. The high-entropy Laves phase, as a kind of multi-component intermetallic, defies convention by displaying plastic deformation at room temperature and different strain rates. Superior damage tolerance of the high-entropy FCC/Laves composite can be achieved over the selected temperature and strain rate ranges with the contribution of deformation twin in FCC phase, as well as dynamic recrystallization over high temperature range. Finally, a constitutive description was developed, which is shown to be able to accurately describe the complicated plastic behavior over a wide range of temperatures and strain rates. These findings suggest promising prospects for advanced material design, opening a new avenue to achieve a fine balance between strength and ductility across different conditions.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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