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Journal of Materials Engineering and Performance

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04-10-2021

Hot Deformation Behavior and Processing Map of High-Strength Mg-2.5Nd-0.2Zn-1.0Zr Alloy

Authors: Xingwei Zheng, Peng Luo, Zhilin Han

Published in: Journal of Materials Engineering and Performance | Issue 2/2022

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Abstract

Hot deformation behavior of high-strength Mg-2.5Nd-0.2Zn-1.0Zr (in wt.%) alloy was investigated by the aid of tensile tests at the temperatures ranging from 200 to 400°C and strain rates varying from 0.001 to 1 s⁻¹. The constitutive relationship of the alloy was modeled by a hyperbolic sine equation based on experimental result. A processing map of the alloy was designed by dynamic material model, which formed a domain of instability at inferior degree of deformation temperature (200-300°C) and relatively large strain rate (1-0.02 s⁻¹). Accordingly, a domain of stability was developed implying the maximum efficiency of power dissipation as high as 46.2%, and relating a couple of optimum parameter values to deformation process, i.e., deformation temperature of 380 °C and strain rate of 0.006 s⁻¹, respectively. Different morphological features of the fracture surface on tensile sample were revealed varying from quasi-cleavage to ductile fracture by decreasing strain rate and simultaneously increasing deformation temperature.

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Title: Hot Deformation Behavior and Processing Map of High-Strength Mg-2.5Nd-0.2Zn-1.0Zr Alloy
Authors: Xingwei Zheng
Peng Luo
Zhilin Han
Publication date: 04-10-2021
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 2/2022
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-021-06244-8

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