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

  • Qijun Xie
  • Zhiwu ZhuEmail author
  • Guozheng Kang
Article
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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.

Keywords

Magnesium alloy Constitutive model Microscopic mechanism Dynamic test Crystal plasticity 

Notes

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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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics 2019

Authors and Affiliations

  1. 1.Key Laboratory of Mountain Hazards and Earth Surface Processes, Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduChina
  2. 2.State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengduChina
  3. 3.Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and EngineeringSouthwest Jiaotong UniversityChengduChina

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