Hot deformation behavior and microstructure characterization of AlCrFe2Ni2(MoNb)0.2 high entropy alloy

Junhui Zhao; Jinshuai Zhang; Xiaoyi Li; Xujie Gao; Nana Guo; Chengcheng Shi; Guangming Zhu; Jinhua Ding; Fengshi Yin

Journal of Materials Research and Technology (Sep 2023)

Hot deformation behavior and microstructure characterization of AlCrFe2Ni2(MoNb)0.2 high entropy alloy

Junhui Zhao,
Jinshuai Zhang,
Xiaoyi Li,
Xujie Gao,
Nana Guo,
Chengcheng Shi,
Guangming Zhu,
Jinhua Ding,
Fengshi Yin

Affiliations

Junhui Zhao: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
Jinshuai Zhang: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
Xiaoyi Li: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
Xujie Gao: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; Shandong Provincial Key Laboratory of Precision Manufacturing and Non-traditional Machining, Zibo 255000, China
Nana Guo: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; Shandong Provincial Key Laboratory of Precision Manufacturing and Non-traditional Machining, Zibo 255000, China; Corresponding author. College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
Chengcheng Shi: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; Shandong Provincial Key Laboratory of Precision Manufacturing and Non-traditional Machining, Zibo 255000, China
Guangming Zhu: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; Shandong Provincial Key Laboratory of Precision Manufacturing and Non-traditional Machining, Zibo 255000, China
Jinhua Ding: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
Fengshi Yin: College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; Shandong Provincial Key Laboratory of Precision Manufacturing and Non-traditional Machining, Zibo 255000, China; Corresponding author. College of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.

Journal volume & issue: Vol. 26
pp. 7012 – 7032

Abstract

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The hot deformation behavior and microstructure evolution of AlCrFe2Ni2(MoNb)0.2 eutectic high entropy alloy at deformation temperatures of 900 °C–1100 °C and strain rates of 0.001 s−1∼1 s−1 were systematically investigated by hot compression tests. The principal structure equations of AlCrFe2Ni2(MoNb)0.2 high entropy alloy were constructed using the Arrhenius equation modified by Zener-Hollomon parameters. The decrease of strain rate and the increase of deformation temperature can enhance the continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) processes simultaneously. The power dissipation and instability diagrams were constructed according to the power dissipation theory and instability criterion, and the hot processing diagrams with strains of 0.3–0.6 were obtained by combining with the Dynamic Material Model (DMM) theory. According to the analysis of power dissipation rate and processing safety zone, the optimal hot processing parameters were found to be ε = 0.6 for the true strain, T = 1050–1100 °C, ε˙ = 0.0037–0.031 s−1.

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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