Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/80750
Title: Physical-based constitutive model considering the microstructure evolution during hot working of AZ80 magnesium alloy
Authors: Su, ZX
Sun, CY
Fu, MW 
Qian, LY
Keywords: AZ80 magnesium alloy
Hot deformation
Constitutive model
Microstructure evolution
Dynamic recrystallization (DRX)
Issue Date: 2019
Publisher: Shanghai University Press
Source: Advances in manufacturing, Mar. 2019, v. 7, no. 1, p. 30-41 How to cite?
Journal: Advances in manufacturing 
Abstract: A physical-based constitutive model was developed to model the viscoplastic flow behavior and microstructure evolution of AZ80 magnesium alloy during the hot working process. The competing deformation mechanisms, including work hardening, dynamic recovery, and dynamic recrystallization, in an isothermal compression environment were considered in the model. The internal state variables, including the normalized dislocation density and recrystallized volume fraction, were incorporated into the model to articulate the microstructure evolution during hot deformation. The kinetic condition critical for dynamic recrystallization, considering the effects of the deformation temperature and strain rate, was obtained by employing both the Poliak-Jonas criterion and Zener-Hollomon parameter. Microstructure observations indicate that the recrystallized volume fraction increases with decreasing Z parameter at constant strain, which is consistent with the predicted kinetics model. Based on the developed model, a good correlation was also obtained between the predicted and experimental flow stress. The results indicate a good predictability of the model in describing the hot deformation behavior and microstructure evolution of AZ80 magnesium alloy.
URI: http://hdl.handle.net/10397/80750
ISSN: 2095-3127
EISSN: 2195-3597
DOI: 10.1007/s40436-018-0243-8
Rights: © The Author(s) 2018
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
The following publication Su, Z. X., Sun, C. Y., Fu, M. W., & Qian, L. Y. (2019). Physical-based constitutive model considering the microstructure evolution during hot working of AZ80 magnesium alloy. Advances in Manufacturing, 7(1), 30-41 is available at https://dx.doi.org/10.1007/s40436-018-0243-8
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