The mechanism of ω-assisted α phase formation in near β-Ti alloys. (15th July 2015)

• Record Type: Journal Article
• Authors: Li, Tong; Kent, Damon; Sha, Gang; Dargusch, Matthew S.; Cairney, Julie M.
• Is Part Of: Scripta materialia. Volume 104(2015)
• Page Start: 75
• Page End: 78
• Publication Date: 2015-07-15
• Subjects: Titanium alloy -- Phase transformations -- Atom probe tomography -- HREM; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.04.007
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract : Partitioning of alloying elements during the ω -to- α phase transformation in a near- β alloy after isothermal ageing at 573 K was measured using atom probe tomography and high-resolution transmission electron microscopy. O-rich regions associated with ω precipitates were observed for the first time, and likely serve as nucleation sites for the α phase. The partitioning behaviours of Al and O, unlike other elements, are different for α and ω, suggesting a mixed-mode mechanism for the ω -to- α phase transformation.