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Microstructure and stress characterization of engineering materials by advanced neutron diffraction

Abstract : The first part of this thesis presents my curriculum and research activities. The second science part is a summary of the last 10 years of my research highlights (after my PhD). Complementing with laboratory microscopy techniques the advanced neutron scattering offers a unique insight into the structure and the dynamic processes of matter from microscopic to macroscopic scale, which is mainly due to its high penetration depth (in cm scale) and flexibility of complex sample environment. As a responsible for teaching users in neutron scattering on engineering materials science and a co-supervisor for cooperated PhD projects, he has first improved the texture characterisation method by neutrons, and second has carried out profound researches on light weight Mg and Ti alloys or their composites, high temperature alloys based on extensive scientific cooperation around the world. In the scientific contribution to this habilitation writing, selective outcome is presented first on the combined study of bulk texture being shown in relation to the residual stress on welding component which plays an important role in real service. And second taking the advantages of neutron diffraction for in-situ studies on texture evolution of advanced lightweight Mg alloy and phase/structure transition (Ni-Mn-Ga and Ti alloy) under thermo-mechanical deformation are thereafter presented.
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https://hal.univ-lorraine.fr/tel-02374529
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Submitted on : Thursday, November 21, 2019 - 4:04:09 PM
Last modification on : Friday, July 17, 2020 - 2:57:19 PM

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  • HAL Id : tel-02374529, version 1

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Weimin Gan. Microstructure and stress characterization of engineering materials by advanced neutron diffraction. Materials Science [cond-mat.mtrl-sci]. Université de Lorraine; École doctorale C2MP - Chimie mécanique matériaux physique (Lorraine), 2019. ⟨tel-02374529⟩

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