Abstract
Micro-tensile tests were performed on single-colony specimens to elucidate the anisotropy of slip behaviour in Ti‒6Al‒4V alloy with a lamellar microstructure. The critical resolved shear stress (CRSS) of pyramidal slip was more than 1.5 times higher than that of slip. The CRSS values of slips increased with increasing length fraction of β phase along the slip direction, revealing that the β phase acts as the hard phase. The pyramidal slip with β laths exhibited a low CRSS value compared with that of a Ti–5Al solid solution, suggesting that the β phase facilitates the slip.
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