. // Understanding and modelling diffusive dynamic phase transformation in titanium alloys

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During this PhD, the student will combine experimental and modelling approaches to better understand deformation-induced phase transformations in titanium. The PhD student will conduct hot compression tests on commercially pure titanium, chosen as a model material to study the fundamental mechanisms in a simplified system.

These experiments will be designed to trigger dynamic phase transformations under controlled conditions. The resulting microstructures will be carefully characterised using optical microscopy, scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD) to identify and quantify the features associated with the formation of the β phase during deformation and its subsequent evolution. In parallel, the student will use existing crystal plasticity simulation tools to investigate how local stresses develop within the microstructure, particularly in the regions where dynamic phase transformation is observed.

This will help clarify the role of stress heterogeneities in the diffusive phase transformation. Building on these insights, the PhD student will also contribute to the development of a mean-field model describing the β-to-α transformation under stress. Eventually, the approach will be extended to a more complex titanium alloy to explore how stress influences solute partitioning during phase transformations, providing a more realistic link to industrial materials and applications.
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Début de la thèse : 01/10/2026
WEB : https://www.cemef.minesparis.psl.eu/wp-content/uploads/2026/04/these_transformation_dynamique_titane.pdf

Autre financement public

ANR Financement d'Agences de financement de la recherche

Mines Paris-PSL

364 SFA - Sciences Fondamentales et Appliquées

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We are seeking a highly motivated candidate with a Master's degree or an engineering diploma (or equivalent). The candidate should have a strong background in materials science and/or solid mechanics, with good foundational knowledge in physical metallurgy. An interest in microstructural characterisation techniques (such as SEM and EBSD) and/or modelling approaches (e.g. crystal plasticity) would be highly appreciated. The ideal candidate should demonstrate curiosity, autonomy, and a willingness to engage in both experimental and modelling work within an interdisciplinary and international research environment.