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- Ji, Zong-Wei, et al.
(författare)
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Mapping deformation mechanisms in lamellar titanium aluminide
- 2018
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Ingår i: Acta Materialia. - : Acta Materialia. - 1359-6454 .- 1873-2453. ; 144, s. 835-843
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Tidskriftsartikel (refereegranskat)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 gamma-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.
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