W Precipitation in Titanium–Molybdenum Alloys, 2013-I

The ω phase is commonly observed in many commercial β or near-β titanium alloys on rapidly cooling from the single β phase field and also during subsequent isothermal annealing.

However, the crystallographic formation mechanism for the ω particles is hitherto unclear/under discussion. The present study primarily focuses on ω precipitation within the β (body-centered cubic (bcc)) matrix of simple model binary titanium–molybdenum (Ti–Mo) alloys.

It provides direct experimental evidence of the formation of ω-like embryos from competing compositional and structural instabilities arising in the bcc lattice of Ti–Mo alloys during rapid cooling from the high-temperature single β phase field.
 

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