|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Shear-induced Phase Transition in Zr via Severe Plastic Deformation
||Hui Wang, Wojciech Dmowski, Yoshihiko Yokoyama, Koichi Tsuchiya, Takeshi Egami
|On-Site Speaker (Planned)
There are three known different phases in zirconium: alpha, beta and omega in accessible pressure-temperature diagram. Alpha phase (HCP) is the stable phase under ambient conditions, and it will transform to ω-phase (Simple Hexagonal) under pressure ~6GPa/RT and to β-phase (BCC) at high temperature ~1100K/1 atm. Recent studies suggested that shear strain applied at RT can also induce transition from α phase to ω and β phases in Zr. It is clear that pressure and shear strain are important factors in this transition, however, the transition mechanism is still not understood and β-phase identification is questionable. In this contribution, we study the shear-induced phase transition in Zr via high-pressure torsion (HPT) using synchrotron X-ray diffraction. We elucidate the phase transitions, grain refinement and changes of texture with different shear strains in HPT-Zr.
||Planned: A print-only volume