Abstract
In bcc metastable titanium alloys, and particularly in superelastic alloys, a unique twinning system occurs during plastic deformation. However, in situ synchrotron x-ray diffraction during a tensile test shows that the phase totally transforms into martensite under stress in a Ti-27Nb (at. %) alloy. twins are thus not formed directly in the phase but are the result of the reversion of parent twins occurring in martensite under stress. The formation of an interfacial twin boundary phase is also observed to accommodate strains induced during the phase reversion.
- Received 25 July 2016
DOI:https://doi.org/10.1103/PhysRevLett.117.245501
© 2016 American Physical Society