Analysis of Cold Dwell Fatigue Crack Initiation Site in a β-Forged Ti-6242 Disk in Relation with Local Texture

Autor: Lionel Germain, Youssef Samih, Pierre Delaleau, Joseph Gilgert, Nathalie Gey

Publikováno v: Metals, Vol 10, Iss 7, p 951 (2020)

The α and prior β textures and microtextures of a lamellar Ti6242 forged disk were characterized by advanced electron back scattered diffraction (EBSD) and related to crystallographic features of faceted crack initiation sites of dwell fatigue spec

Externí odkaz: https://doaj.org/article/9d303bb973c14ea095e716c61552ba2b

Micromechanical Modeling of the Elasto-Viscoplastic Behavior and Incompatibility Stresses of β-Ti Alloys

Autor: Safaa Lhadi, Maria-Rita Chini, Thiebaud Richeton, Nathalie Gey, Lionel Germain, Stéphane Berbenni

Publikováno v: Materials, Vol 11, Iss 7, p 1227 (2018)

Near β titanium alloys can now compete with quasi-α or α/β titanium alloys for airframe forging applications. The body-centered cubic β-phase can represent up to 40% of the volume. However, the way that its elastic anisotropy impacts the mechani

Externí odkaz: https://doaj.org/article/648d6848cd644f6c8efbebc2d9c0e2fa

Dislocation analysis of a complex sub-grain boundary in UO2 ceramic using accurate electron channelling contrast imaging in a scanning electron microscope

Autor: Martin A. Crimp, H. Mansour, X. Iltis, Nathalie Gey, Nabila Maloufi

Publikováno v: Ceramics International
Ceramics International, Elsevier, 2019, 45 (15), pp.18666-18671. ⟨10.1016/j.ceramint.2019.06.091⟩
Ceramics International, 2019, 45 (15), pp.18666-18671. ⟨10.1016/j.ceramint.2019.06.091⟩

International audience; In this work, accurate electron channelling contrast imaging (A-ECCI) assisted by high resolution selected area channelling patterns (HR-SACP) was used to characterize the structure of a complex low sub-grain boundary in a cre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f573db3884a3321b47e70056c8faac9e
https://doi.org/10.1016/j.ceramint.2019.06.091

Influence of intra-granular void distribution on the grain sub-structure of UO2 pellets after high temperature compression tests

Autor: X. Iltis, Nabila Maloufi, Nathalie Gey, M. Ben Saada, Philippe Garcia, A. Miard

Publikováno v: Journal of Nuclear Materials
Journal of Nuclear Materials, 2021, 545, pp.152632. ⟨10.1016/j.jnucmat.2020.152632⟩
Journal of Nuclear Materials, Elsevier, 2021, 545, pp.152632. ⟨10.1016/j.jnucmat.2020.152632⟩
Journal of Nuclear Materials, Elsevier, 2021, ⟨10.1016/j.jnucmat.2020.152632⟩
Journal of Nuclear Materials, Elsevier, 2020, 545, pp.152632. ⟨10.1016/j.jnucmat.2020.152632⟩

The aim of this work is to study the role of intra-granular voids on the macroscopic behavior and the mi- crostructure of uranium dioxide (UO 2 ) for different strain conditions in the high temperature dislocational creep regime. Two batches (B1 and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7608821fe0edebd44066d7cd6a53a448
https://hal.univ-lorraine.fr/hal-02993289

Huge local elastic strains in bulk nanostructured pure zirconia materials

Autor: Taylan Örs, Vincent Michel, Marc Huger, Jean-Sébastien Micha, Nathalie Gey, Olivier Castelnau, Fanny Gouraud, René Guinebretière

Publikováno v: Materials Science and Engineering: A
Materials Science and Engineering: A, Elsevier, 2021, 806, pp.140817. ⟨10.1016/j.msea.2021.140817⟩

From the liquid state to room temperature, two successive solid-state phase transitions occur in pure zirconia. It is well-known that the last one (tetragonal to monoclinic) is martensitic and induces large volume variations and shear strains. Elasti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3965bf019bcd7ba878ad7e9b214eb07
https://hdl.handle.net/10985/19947