Composition of ω-Phase Particles in Ti(Mo) Alloys Studied by Anomalous X-ray Diffraction

Abstract

Nanoparticles of hexagonal ω phase in bcc-Ti(Mo) single crystals (β phase) occur due to a diffusionless athermal β to ω transformation and they grow during follow-up ageing at elevated temperatures, while the alloying atoms (Mo in our case) are expelled from the nanoparticle volumes. We investigated the Mo content in growing ω nanoparticles by anomalous X-ray diffraction and demonstrate that the Mo expulsion from the ω phase is not full; a thin shell of a nanoparticles where the β to ω transformation is not complete still contains a considerable amount of Mo atoms.

Investigation of Nanostructures with X-ray Scattering Techniques

“…In the last contribution to the special issue Jana Šmilauerova et al [13] investigated the chemical composition of nanoparticles formed inside single crystalline Ti(Mo) alloys. Since the formation of these nanoparticles influences the mechanical properties of the important engineering Ti alloys a better understanding of the nature of the occurring transformation is needed.…”