|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||The Completeness of ω Phase Transformation in Metastable β Titanium Alloys Studied by X-ray Diffraction
||Jana Šmilauerová, Václav Holý, Petr Harcuba, Dominik Kriegner
|On-Site Speaker (Planned)
Particles of metastable ω phase with hexagonal crystallographic structure form in a certain composition range in metastable β titanium alloys. The β to ω phase transformation can be described as periodic shifts of (111) planes of the body-centered cubic β matrix in the <SUB>β</SUB> direction. The completeness of the β to ω phase transformation was studied by measuring various X-ray diffraction peaks in single-crystalline Ti-15Mo alloy. In particular, the diffraction maximum 20-22, which is forbidden both in pure β and ω structures but is allowed in partially collapsed ω structure, and other selected diffraction maxima allowed in a fully collapsed ω structure were measured. From the comparison of integrated intensities and widths of diffraction maxima with a simulation, the degree of (111)<SUB>β</SUB> planes collapse was determined. The profile of the degree of the collapse in an ω particle was also estimated.
||Planned: Supplemental Proceedings volume