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- W2125240257 abstract "Single crystals of c-TiAl cannot be grown in the near-stoichiometric compositions that are present inside two-phase c=a2-microstructures with attractive mechanical properties. Therefore, the single-crystal constitutive behavior of c-TiAl was studied by nanoindentation experiments in single-phase regions of these c=a2-microstructures. The experiments were characterized by orientation microscopy and atomic force microscopy to quantify the orientation-dependent mechanical response during nanoindentation. Further, they were analyzed by a three-dimensional crystal plasticity finite element model that incorporated the deformation behavior of c-TiAl. The spatially resolved activation of competing deformation mechanisms during indentation was used to assess their relative strengths. A convention was defined to unambiguously relate any indentation axis to a crystallographic orientation. Experiments and simulations were combined to study the orientation-dependent surface pile-up. The characteristic pile-up topographies were simulated throughout the unit triangle of c-TiAl and represented graphically in the newly introduced inverse pole figure of pile-up patterns. Through this approach, easy activation of ordinary dislocation glide in stoichiometric c-TiAl was confirmed independently from dislocation observation by transmission electron microscopy. 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved." @default.
- W2125240257 created "2016-06-24" @default.
- W2125240257 creator A5022690024 @default.
- W2125240257 creator A5041020801 @default.
- W2125240257 date "2010-05-01" @default.
- W2125240257 modified "2023-09-26" @default.
- W2125240257 title "Plastic anisotropy of γ-TiAl revealed by axisymmetric indentation" @default.
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- W2125240257 doi "https://doi.org/10.1016/j.actamat.2010.02.025" @default.