Ludovic Héricher

TL;DR: In this article, the formation of high temperature microstructures in β metastable titanium alloys is described based on the classical theory of nucleation, and on growth laws obtained by assuming that the processes are controlled by the diffusion of the alloying chemical species only.

TL;DR: In this paper, a model predicting the influence of the deformation of the β phase on the α phase precipitation during isothermal treatments, by extending its range of application to the case of cooling treatments, is presented.

Abstract: The aim of this paper is to present recent experimental results and related simulation about the β → α GB + α WGB and β → α W1 transformations which occur in the Ti17 alloy during the thermal treatments following the heating in the β phase field. These phase transformations were experimentally studied under isothermal conditions in samples with negligible thermal gradients. The IT diagram was obtained, on the basis of electrical resistivity measurements and microstructural SEM observations. The kinetics of the phase transformation was further numerically simulated for continuous cooling on the basis of a formerly developed model giving the amount of each morphology (α WGB , α W1 ). Experimental and calculated results are compared.