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- W2068137783 abstract "The effect of transition metal solutes on the lattice parameters of γ-TiAl and α2-Ti3Al were studied by first principles calculations to find suitable elements for controlling the α2/γ interfacial misfit in lamellar Ti–Al alloys. Better agreement was found between the calculated and experimental phase and site preferences of impurity atoms than in a previous first principles study. The calculated lattice parameters suggest that elements in groups 6–11 of the 4th period (Cr, Mn, Fe, Co, Ni and Cu) are effective for increasing the misfit, leading to increasing density of misfit dislocation and, in turn, higher yield strength and ductility. This effect is caused by the change in the lattice parameter of the γ-TiAl phase rather than those of α2-Ti3Al phase. This prediction agrees qualitatively with experimental data from a previous study although the effects of temperature are not taken into account. Further improvements should be possible by considering those effects. Nevertheless, the results highlight the effects of impurity addition on interfacial misfit at a level which cannot be achieved by classical concepts such as atomic size in a hard sphere model. The results will also be valuable in further more quantitative predictions and in understanding the effects of temperature, including off-stoichiometry, thermal expansion and vibration entropy." @default.
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- W2068137783 date "2011-10-01" @default.
- W2068137783 modified "2023-09-26" @default.
- W2068137783 title "Effect of impurity atoms on α<sub>2</sub>/γ lamellar interfacial misfit in Ti–Al alloy: a systematic first principles study" @default.
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- W2068137783 doi "https://doi.org/10.1080/14786435.2011.588971" @default.
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