|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Using Temporary Hydride Formation in Metastable Beta Titanium Alloys to Improve the Microstructure
||Hans-Juergen Christ, Vitali Macin
|On-Site Speaker (Planned)
Hydrogen can be used as a temporary alloying element during the heat treatment, often referred to as Thermohydrogen Treatment (THT), in order to improve the mechanical properties of titanium alloys by means of microstructure modification. THT is based on the changes of the stability and transformation kinetics of phases and on the formation of hydrogen-induced phases, such as TiHx in titanium alloys, as a consenquence of hydrogen supersaturation. The volume effects associated with hydride formation leads to local matrix deformation accompanied by an increase in the dislocation density. It is shown in this contribution that hydride formation and subsequent dissolution can be used to improve the mechanical properties of the two beta titanium alloys Ti-10-2-3 and Beta-C by establishing a fine microstructure via hydride-induced recrystallisation and a homogeneous formation of secondary alpha nuclei indirectly via hydride precursors, respectively.
||Planned: A print-only volume