Slip line morphology, distribution and identification of sample A with 0.8 % tensile strain. Continuous and dotted black lines represent the calculated traces of basal and prismatic slip systems, respectively. (a) SEM image and slip line identification; (b) IPF map corresponding to Fig. 2a, step size 0.4 lm; (c) SEM image with higher magnification and slip line identification; (d) {110} b /{0002} a and {111} b /{11 20} a pole figures of a lamellae (labeled a, b) and thin b layers (labeled o) in Fig. 2c.

Contexts in source publication

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... sample A with 0.8 % tensile strain, basal and prismatic slip system activations were detected in the selected a grains, which possess relatively high basal or prismatic slip Schmid factors (SFs), as shown in Fig. 2 and Table 3. At this deformation stage, the slip lines are straight and relatively fine (see the grains labeled 1, 2, and 8 in Fig. 2a). The slip lines show an almost equidistant distribution in the a grains. The slip lines originate from grain/phase boundaries and gradually extend into the grain interior. Two equivalent {10 10}<11 20> ...

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... sample A with 0.8 % tensile strain, basal and prismatic slip system activations were detected in the selected a grains, which possess relatively high basal or prismatic slip Schmid factors (SFs), as shown in Fig. 2 and Table 3. At this deformation stage, the slip lines are straight and relatively fine (see the grains labeled 1, 2, and 8 in Fig. 2a). The slip lines show an almost equidistant distribution in the a grains. The slip lines originate from grain/phase boundaries and gradually extend into the grain interior. Two equivalent {10 10}<11 20> slip system traces are additionally presented in some a grains (see grains 3 and 4 in Fig. ...

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... fine (see the grains labeled 1, 2, and 8 in Fig. 2a). The slip lines show an almost equidistant distribution in the a grains. The slip lines originate from grain/phase boundaries and gradually extend into the grain interior. Two equivalent {10 10}<11 20> slip system traces are additionally presented in some a grains (see grains 3 and 4 in Fig. ...

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... the distributions of slip lines in the observed zone are heterogeneous. No obvious slip traces were detected in some a grains, such as grains 5 and 6 in Fig. 2a, which also possess relative high SFs for basal or prismatic slip. These results indicate that, for polycrystals/multiphase materials, the slip system activations are not only determined by the relationships between crystallographic orientation and load axis, but other factors, such as grain morphology, neighbor phase and grains ...

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... the deformation strain is very small (Sample A, 0.8 % tensile strain), the slip is not constrained to one grain. Slip transmission phenomenon is observed in some regions, as shown in Fig. 2c. It shows clearly that slip transfers from one a lamella (labeled a) into another neighboring a grain (labeled b) by activating the related slip system of the b layer (labeled o) between them. This result is different from Bridier group's work on slip line morphology observation during Ti-6Al-4V in situ tensile deformation, which ...

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... alloy, which contains only 8.1 % b phase (volume fraction). Thus, the b layer is relatively thin and the slip is easy to transfer in comparison with a/b Ti-6Al-4V. Second, the Burgers orientation relationship (OR) ({0001} a ||{110} b ,< 1 1 20> a ||<111> b ) is fully maintained between a lamellae (labeled a and b) and b layer (labeled o) (see Fig. 2d). This special OR may facilitate the slip transmission [37,38]. The nature and distribution of gliding of sample B evolves significantly with increasing tensile strain. More a grains have been activated compared with sample A, as shown in Fig. 3a. Basal and prismatic slip systems are still the dominant deformation modes for a grains in ...