Hot compression behavior, simulation verification and dynamic recrystallization mechanism of Mg-Gd-Y-Zr alloy

Dongzhen Wang; Xiaoya Chen; Quanan Li; Hongxi Zhu; Huanju He

Journal of Materials Research and Technology (Jul 2024)

Hot compression behavior, simulation verification and dynamic recrystallization mechanism of Mg-Gd-Y-Zr alloy

Dongzhen Wang,
Xiaoya Chen,
Quanan Li,
Hongxi Zhu,
Huanju He

Affiliations

Dongzhen Wang: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
Xiaoya Chen: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang, 471023, China; Corresponding author. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China.
Quanan Li: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang, 471023, China; Longmen Laboratory, Luoyang 471000, China; Corresponding author. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China.
Hongxi Zhu: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang, 471023, China
Huanju He: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China

Journal volume & issue: Vol. 31
pp. 3712 – 3725

Abstract

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The uniaxial hot compression experiments of Mg-7Gd-3Y-0.5Zr (VW73K) alloy were carried out by using the Instron5982 mechanical testing machine with environmental box. The hot deformation behavior at 350–500 °C and 0.001–1 s−1 was studied. Based on the stress-strain curve obtained from the experiment, a strain-compensated Arrhenius constitutive model, hot processing maps, and dynamic recrystallization (DRX) kinetics model of VW73K alloy were established. The results show that the machinable area of VW73K alloy is 450–500 °C and 0.001–0.1 s−1. Under machinable parameters, the force-displacement data obtained from the experiment are highly consistent with the finite element simulation, verifying the dependability of the strain-compensated Arrhenius constitutive model for the rheological behavior of VW73K alloy during hot compression. VW73K alloy is more easily to DRX at high temperatures and low strain rates, with higher recrystallization volume fraction and faster recrystallization rate. The DRX process of VW73K alloy during hot compression is completed by the collaboration of discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX).

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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