Fine-grained structure fabricated by strain-induced martensite and its reverse transformations in a metastable β titanium alloy

摘要

Submicron-sized β grains were attained in a metastable βTi_(77.5)V_(15.9)Al_(3.6)Sn_(3.0) alloy through the strain-induced martensite and its reverse transformations process, characterized by a single cycle of conventional cold rolling and annealing. The grain refinement was attributed mainly to the reverse-transformed β grains from nanosized α" and ot phases. During the continuous heating of the cold-rolled specimen, the β to α transformation occurred first, and α" to β and α to β reverse transformations took place sequentially. ?2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.