Abstract
The impact of non-shearable particles on the stress required to propagate a twin is examined using numerical and analytical techniques. Of particular note is the nature of this effect in magnesium alloys where twinning can count for a significant fraction of the plastic strain. Dislocation Dynamics simulations are employed to calculate the Orowan bypass stress. It is seen that the stress for bypass can exceed that for a single twinning dislocation but under some circumstances it may be similar. The conditions that give rise to different regimes of behaviour are mentioned and the significance for magnesium alloy design is described.
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Acknowledgements
The authors would like to acknowledge valuable discussions on the topic with Laurent Capolungo and Marc Fivel. The Australian Research Council Discovery Grant Scheme and the Deakin University DUPRS scheme are also gratefully acknowledged.
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Barnett, M.R., Wang, H. (2018). Interaction Between Propagating Twins and Non-shearable Precipitates in Magnesium Alloys. In: Orlov, D., Joshi, V., Solanki, K., Neelameggham, N. (eds) Magnesium Technology 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72332-7_56
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DOI: https://doi.org/10.1007/978-3-319-72332-7_56
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