Hot deformation behaviors and processing maps of Mg–Zn–Er alloys based on Gleeble–1500 hot compression simulation
The hot deformation behaviors of as-solution Mg–xZn–yEr alloys (x/y=6, x=3.0, 4.5 and 6.0; y=0.50, 0.75 and 1.00) were investigated on Gleeble–1500 thermal simulator in a temperature range of 200–450 °C at a strain rate of 0.001–1 s−1. The true stress–strain curves showed the dynamic competition between the working hardening and working softening mainly due to the dynamic recrystallization (DRX) occurring during hot compression. The constitutive equations were constructed which could accurately predict the peak stress of the alloys. The addition of Zn and/or Er resulted in higher deformation activation energy for Mg–3Zn–0.5Er (alloy A). The processing maps were constructed as function of the temperature and the strain rate, providing the optimum hot working conditions (i.e., at strain of 0.3, Mg–3Zn–0.5Er (alloy A): 380–430 °C, <0.1 s−1; Mg–4.5Zn–0.75Er (alloy B): 380–450 °C, 0.01–0.1 s−1; Mg–6Zn–1Er (alloy C): 390–440 °C, 0.01–0.1 s−1). The as-solution treated Mg–4.5Zn–0.75Er (alloy B) demonstrated more optimum hot working window comparing with Mg–3Zn–0.5Er (alloy A) and Mg–6Zn–1Er (alloy C).
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- Materials
- 4019 Resources engineering and extractive metallurgy
- 4017 Mechanical engineering
- 4016 Materials engineering
- 0914 Resources Engineering and Extractive Metallurgy
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Materials
- 4019 Resources engineering and extractive metallurgy
- 4017 Mechanical engineering
- 4016 Materials engineering
- 0914 Resources Engineering and Extractive Metallurgy