|About this Abstract
||MS&T22: Materials Science & Technology
||Processing-Microstructure-Property Relationships of Titanium and Titanium Alloys
||Insights from Three-dimensional Characterization of Twins in Titanium
||Rodney J. McCabe, Hi T Vo, Patrick R Pinney, Matthew M Schneider, M. Arul Kumar, Carlos N Tome, Laurent Capolungo
|On-Site Speaker (Planned)
||Rodney J. McCabe
Deformation twinning has a significant impact on the evolution of microstructure and mechanical response in hexagonal close packed (hcp) metals. Three dimensional (3D) microstructural neighborhoods influence the local stresses that drive twinning phenomena and have significant effects on evolving twin microstructures. Here we show 3D microstructure effects on twinning in high-purity titanium revealed through two experiments: differential aperture X-ray microscopy and plasma (P)FIB based 3D-EBSD. The differential aperture x-ray microscopy experiment highlights the importance of stress concentrations not only for twin nucleation, but also to the growth process of twins, particularly for low Schmid factor twins. The 3D-EBSD experiments feature the importance of twin-twin interactions in 3D including variant interactions within grains, twin crossings at grain boundaries, and co-nucleation of twins.