Abstract
Twin boundary (TB) as a perfectly symmetric grain boundary has received lots of attention for the positive effects on material strength and ductility. A bicrystal containing a vertical TB was introduced in discrete dislocation dynamics (DDD) method to study the effect of TB on the mechanical property . The DDD results show that the TB has hardly any hardening or softening effect on the strength and sample size effects of bicrystals, as compared with the single crystals. This is because the deformation is mainly mediated by screw dislocations, which are able to pass through TB in a cross-slip-like manner without any blocking effect from TB.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (Grant No. 11672251, 11872321, U1730106), the Fundamental Research Funds for the Central Universities (Grant No. 2682017QY03).
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Wei, D., Fan, H., Tang, J., Zhang, X. (2019). Effect of a Vertical Twin Boundary on the Mechanical Property of Bicrystalline Copper Micropillars. In: TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05861-6_124
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DOI: https://doi.org/10.1007/978-3-030-05861-6_124
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