A temperature-dependent crystal plasticity model for predicting cyclic loading behaviors of a magnesium alloy

A temperature-dependent crystal plasticity model for predicting cyclic loading behaviors of a magnesium alloy

BONG Hyuk Jong

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Abstract. In this work, a crystal plasticity finite element (CPFE) model to predict cyclic loading behaviors at elevated temperatures of a wrought magnesium alloy, i.e., AZ31B sheet, is proposed. The temperature-dependent mechanical behavior is systematically modeled by modifying the strain-hardening model. The twinning-detwinning, a key deformation mechanism that occurs during the cyclic loadings in the magnesium sheet, is also modeled based on the well-known predominant twinning reorientation (PTR) scheme. Furthermore, to better predict the detwinning behavior, a concept of residual twin is also introduced and employed in the PTR scheme. The modified strain-hardening and enhanced-PTR model considering the twinning-detwinning are implemented in the CPFE framework. Using the developed model, mechanical responses of the AZ31B sheet under cyclic loading conditions at various testing temperatures up to 200°C are predicted and compared with the experimental data, and the prediction results are promising.

Crystal Plasticity, Magnesium Alloy, Cyclic Loading, Twin-Detwin

Published online 4/24/2024, 9 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: BONG Hyuk Jong, A temperature-dependent crystal plasticity model for predicting cyclic loading behaviors of a magnesium alloy, Materials Research Proceedings, Vol. 41, pp 1215-1223, 2024

DOI: https://doi.org/10.21741/9781644903131-135

The article was published as article 135 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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