1. Mapping deformation mechanisms in lamellar titanium aluminide.
- Author
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Ji, Zong-Wei, Lu, Song, Hu, Qing-miao, Kim, Dongyoo, Yang, Rui, and Vitos, Levente
- Subjects
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TITANIUM aluminides , *METAL formability , *MATERIAL plasticity , *HIGH temperature metallurgy , *ORIENTATION (Chemistry) - Abstract
Breakdown of Schmid's law is a long-standing problem for exploring the orientation-dependent deformation mechanism in intermetallics. The lack of atomic-level understanding of the selection rules for the plastic deformation modes has seriously limited designing strong and ductile intermetallics for high-temperature applications. Here we put forward a transparent model solely based on first principles simulations for mapping the deformation modes in γ -TiAl polysynthetic twinned alloys. The model bridges intrinsic energy barriers and different deformation mechanisms and beautifully resolves the complexity of the observed orientation-dependent deformation mechanisms. Using the model, one can elegantly reveal the atomic-level mechanisms behind the unique channeled flow phenomenon in lamellar TiAl alloys. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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