Benoît Appolaire

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 article, the phase transformation of Ti17 near β titanium alloy during heat treatments was studied experimentally by combining X-ray diffraction analysis, electrical resistivity and microscopy observations, and a Johnson-Mehl-Avrami-Kolmogorov (JMAK) model was successfully used to describe phase transformation kinetics during either isothermal or cooling treatments.

TL;DR: In this paper, a phase field model accounting for size-dependent viscoplasticity is developed to study materials in which microstructure evolution and viscoplast behavior are strongly coupled.

TL;DR: In this article, a general constitutive framework is proposed to incorporate linear and nonlinear mechanical behaviour laws into a standard phase field model and two mixture rules for strain and stress are introduced, which are based on the Voigt/Taylor and Reuss/Sachs well-known homogenization schemes.

TL;DR: In this article, isothermal decomposition of β metastable phase was studied, directly after solution treatment in the β temperature range, for temperatures ranging from 300 to 450°C for two beta metastable alloys (Ti 17 and Ti 5553).