期刊
SCRIPTA MATERIALIA
卷 177, 期 -, 页码 223-228出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.10.016
关键词
Micro-tensile test; Titanium alloys; Plastic deformation; Interfaces; Slip
Micro-tensile tests were performed on single-colony specimens to elucidate the anisotropic slip behaviour in Ti-6Al-4V alloy with a lamellar microstructure. The critical resolved shear stress (CRSS) of < c + a > pyramidal slip was more than 1.5 times higher than that of < a > slip. The CRSSes of (a) slips increased with increasing length fraction of beta phase along the slip direction, revealing that the beta phase acts as a hard phase for soft orientations. The < c + a > pyramidal slip with beta laths exhibited a low CRSS value compared with that of a Ti-5Al solid solution, suggesting that the beta phase facilitates the < c + a > slip. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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