Unravelling the nucleation and growth of {11-(2)over-bar2} twins

0558216 - ÚFM 2023 RIV GB eng J - Journal Article
Ostapovets, Andriy - Verma, Ritu - Serra, A.
Unravelling the nucleation and growth of {11-(2)over-bar2} twins.
Scripta Materialia. Roč. 215, JUL (2022), č. článku 114730. ISSN 1359-6462. E-ISSN 1872-8456
Institutional support: RVO:68081723
Keywords : twinning dislocations * computer-simulation * hcp metals * deformation * defects * boundaries * titanium * crystallography * disconnections * interface * Twinning * Titanium * Phase transformation * Disconnections * Twin boundaries
OECD category: Materials engineering
Impact factor: 6, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S1359646222002263?via%3Dihub

A recently proposed mechanism of {11 <(2) over bar > 2} twin nucleation in Ti by reverse phase transformation is analysed. It is demonstrated that, not only nucleation, but also growth mechanism of an already formed twin is connected to the possibility of the phase transformation in the system, which leads to the existence of several competing structures of twin boundary. The twin growth is mediated by subsequent glide of step-like defects (disconnections) along the {1122} boundary. The twin shear is completed by gliding of pair of disconnections, which also converts twin boundary structure between two alternative variants.
Permanent Link: https://hdl.handle.net/11104/0332431