ICAMS / Interdisciplinary Centre for Advanced Materials Simulation

Publications

Nucleation driving force for ω-assisted formation of α and associated ω morphology in β-Ti alloys

T. Li, D. Kent, G. Sha, H. Liu, S. G. Fries, A. V. Ceguerra, J. M. Cairney, M. S. Dargusch.

Scripta Materialia, 155, 149-154, (2018)

Structural and chemical changes at ω/β Ti alloys interfaces and the evolution of the morphology of ω in a near-β alloy at 12 and 16 hours isothermal ageing at 573 K.

Abstract
The structural and chemical changes at ω/β interfaces and the evolution of the morphology of ω in a near-β alloy during isothermal ageing at 573 K were investigated by atom probe tomography and aberration-corrected high-resolution transmission electron microscopy. Ledges and local O enrichment at semi-coherent isothermal ω interfaces are proposed to provide the key driving force for nucleation of ω-assisted α. Following nucleation of α, the morphology of ω evolves from ellipsoidal to rod-like, induced by rapid consumption of ω by α.


DOI: 10.1016/j.scriptamat.2018.06.039
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