Influence of grain size and crystallographic texture on mechanical behavior of TIMETAL-LCB in metastable β-condition

The mechanical behavior of TIMETAL-LCB titanium-based alloy in a metastable beta-condition with different beta-grain size and crystallographic texture was studied at varying tensile strain rates (3.2 x 10(-5) s(-1)-3.6 x 10(-1) s(-1)) at room temperature. A principal role of crystallographic texture in the mode of plastic flow was established. It was found that the presence of a sharp axial (110)beta-texture caused similar mechanical behavior of both fine- and coarse-grained microstructures for all strain rates whereas a random texture in the coarse-grained material led to significant localization of the plastic flow, which became more pronounced at lower strain rates and eventually resulted in cleavage along slip planes and early failure. (C) 2012 Published by Elsevier B.V.