The particle stimulated nucleation in Ti-35V-15Cr-0.3Si-0.1C alloy

A special recrystallization mechanism called 'particle stimulated nucleation' (PSN) is found responsible for the pervasive discontinuous dynamic recrystallization (DDRX) in the burn resistant beta-stablized Ti-35V-15Cr-0.3Si-0.1C alloy. This might be the first time that PSN is found in titanium alloys. PSN mechanism is studied by transmission electron microscopy (TEM) and Electron Back Scattered Diffraction (EBSD) techniques. Local strain incompatibility between the matrix and the titanium carbides leads to high density of dislocation in the particle deformation zone (PDZ), which provides the ideal sites for PSN. Recrystallized grains produced by PSN is randomly oriented and the microtexture gets weaker as the fraction of DRX increases. (C) 2015 Elsevier B.V. All rights reserved.