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Crystal-Plasticity-Based Dynamic Constitutive Model of AZ31B Magnesium Alloy at Elevated Temperature and with Explicit Plastic-Strain-Rate Control

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Abstract

In this study, a series of experiments were carried out on the AZ31B magnesium alloy, including both a macro-experiment (mechanical experiment) and a micro-experiment (dislocation observation). Next, based on the consideration of the deformation mechanism of magnesium alloys (dislocation slip and twinning), a dynamic constitutive model of the magnesium alloy was established. In the developed model, the strain-rate-sensitivity control and the effect of temperature on the dynamic mechanical performance of the alloy were also investigated. The model parameters were determined by fitting the macroscopic experimental results. Next, the evolution of the micro-deformation mechanism was calculated by the developed model, and the trend of macro-mechanical behavior was also discussed.

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Acknowledgements

This work was supported by the National Key Research and Development Program of China (2016YFB1200505), the National Natural Science Foundation of China (11672253), the Opening Foundation of State Key Laboratory for Strength and Vibration of Mechanical Structures (SV2019-KF-19), and the Applied Basic Research Project of Science and Technology Department of Sichuan Province, China (2017JY0221).

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Authors and Affiliations

  1. Key Laboratory of Mountain Hazards and Earth Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China

    Qijun Xie

  2. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China

    Qijun Xie, Zhiwu Zhu & Guozheng Kang

  3. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Qijun Xie, Zhiwu Zhu & Guozheng Kang

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  1. Qijun Xie
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  3. Guozheng Kang
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Correspondence to Zhiwu Zhu.

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Xie, Q., Zhu, Z. & Kang, G. Crystal-Plasticity-Based Dynamic Constitutive Model of AZ31B Magnesium Alloy at Elevated Temperature and with Explicit Plastic-Strain-Rate Control. Acta Mech. Solida Sin. 33, 31–50 (2020). https://doi.org/10.1007/s10338-019-00130-6

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  • DOI: https://doi.org/10.1007/s10338-019-00130-6

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