Crossover from Deformation Twinning to Lattice Dislocation Slip in Metal–Graphene Composites with Bimodal Structures
Theoretical model is suggested, which describes of a new micromechanism of crossover from deformation twinning to lattice dislocation slip in metal−graphene nanocomposite with a bimodal structure. In the framework of the model, the lattice dislocation slip occurs through emission of lattic...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/1/47 |
| Summary: | Theoretical model is suggested, which describes of a new micromechanism of crossover from deformation twinning to lattice dislocation slip in metal−graphene nanocomposite with a bimodal structure. In the framework of the model, the lattice dislocation slip occurs through emission of lattice dislocations from the disclinated grain boundary fragments between a nanocrystalline metal−matrix and large (micrometer-size) grains providing the plastic deformation of bimodal metal−graphene nanocomposite. It is shown that the lattice dislocation emission serves as an effective stress relaxation channel being in competition with nanocrack generation. |
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| ISSN: | 2073-4352 |