The role of Ta on twinnability in nanocrystalline Cu–Ta alloys
| Autor: | M. A. Bhatia, M. Rajagopalan, K. A. Darling, M. A. Tschopp, K. N. Solanki |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Materials Research Letters, Vol 5, Iss 1, Pp 48-54 (2017) |
| Druh dokumentu: | article |
| ISSN: | 2166-3831 21663831 |
| DOI: | 10.1080/21663831.2016.1201160 |
| Popis: | Nanostructured Cu–Ta alloys show promise as high-strength materials in part due to their limited grain growth. In the present study, we elucidate the role of Ta on the transition from deformation twinning to dislocation-mediated slip mechanisms in nanocrystalline Cu through atomistic simulations and transmission electron microscopy characterization. In particular, computed generalized stacking fault energy curves show that as Ta content increases there is a shift from twinning to slip-dominated deformation mechanisms. Furthermore, heterogeneous twinnability from microstructural defects decreases with an increase in Ta. The computed effect of Ta on plasticity is consistent with the HRTEM observations. |
| Databáze: | Directory of Open Access Journals |
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