omega-phase transformation and lattice modulation in biomedical beta-phase Ti-Nb-Al alloys

摘要

Athermal omega-phase transformation and the appearance of the lattice modulation in Ti-28Nb-xAl alloys were investigated by electrical resistivity measurements and transmission electron microscopy (TEM) observations. As a result, the athermal omega-phase is gradually suppressed with increasing Al content. In addition, the lattice modulation is also observed in Ti-28Nb-xAl alloys (0 = x = 7, in at.%) because of the transverse wave with a propagation vector of q =1/2[zeta(zeta) over bar]* and displacement in [110]. These results imply that the omega-phase can be controlled by addition of the Al content in Ti-Nb alloys, leading to the development of low Young's modulus beta-phase Ti biomedical alloys single crystal. (C) 2018 The Authors. Published by Elsevier B.V.