In Situ Synchrotron Radiation Study of TiH sub(2)-6Al-4V and Ti-6Al-4V: Accelerated Alloying and Phase Transformation, and Formation of an Oxygen-Enriched Ti sub(4)Fe sub(2)O Phase in TiH sub(2)-6Al-4V

In situ heating, synchrotron radiation X-ray diffraction has been used to study the alloying and phase transformation behavior of TiH sub(2)-6Al-4V and Ti-6Al-4V alloys. Accelerated alloying and phase transformation were observed in the powder compact of the TiH sub(2)-6Al-4V alloy subjected to a high heating rate. In addition, an oxygen-stabilized Ti sub(4)Fe sub(2)O phase, which is present as sub-micron or nanoscaled particles, has been identified in the TiH sub(2)-6Al-4V alloy. The implications of these experimental findings have been discussed in terms of alloying, improved densification and oxygen scavenging in titanium and titanium alloys.