{"id":6557,"global_id":"www.cnrs-imn.fr\/en\/?id=6557","global_id_lineage":["www.cnrs-imn.fr\/en\/?id=6557"],"author":"4","status":"publish","date":"2026-06-29 15:04:20","date_utc":"2026-06-29 13:04:20","modified":"2026-06-29 15:06:17","modified_utc":"2026-06-29 13:06:17","url":"https:\/\/www.cnrs-imn.fr\/en\/event\/hdr-defense-by-emmanuel-bertrand-id2m\/","rest_url":"https:\/\/www.cnrs-imn.fr\/en\/wp-json\/tribe\/events\/v1\/events\/6557","title":"HDR Defense by Emmanuel BERTRAND (ID2M)","description":"

\"\"<\/p>\n

\n
Studies of the relationships between process, microstructure, and mechanical properties of metals.
\nRole of deformation mechanisms and wire arc additive manufacturing.<\/h5>\n

Abstract<\/strong>: Among the broad family of metal alloys, some are subject to specific deformation mechanisms: stress-induced martensitic transformation, reorientation twinning, plastic twinning, etc. These mechanisms give rise to very specific mechanical behaviors: shape memory effect, superelasticity, and TRIP- and\/or TWIP-effect alloys.<\/p>\n

To gain a better understanding of these often concurrent mechanisms, my approach involved studying the sequences of deformation mechanisms in \u03b2-metastable titanium alloys. I then turned my attention to the relationships between an alloy\u2019s chemical composition and its deformation mechanisms before expanding my research to other martensitic-transforming alloys. <\/p>\n

Another part of my work involves developing solutions to problems caused by the behavior of metal alloys in additive manufacturing. Depending on the metals in question, the issues vary: a decrease in mechanical properties, anisotropy resulting from solidification behavior, heat accumulation, and so on. <\/p>\n

Original solutions are proposed at the intersection of materials science and process engineering. This approach enables a detailed understanding of the relationships between process, microstructure, and metal properties, and helps overcome scientific and technological barriers. <\/p>\n

Keywords<\/strong>: titanium alloys; wire arc additive manufacturing; metallurgy; microstructure<\/p>\n

\n
Studies of the relationships between process, microstructure, and mechanical properties of metals.
\n: The role of deformation mechanisms and wire arc additive manufacturing<\/h5>\n

Abstract<\/strong>: Among the large family of metal alloys, some are subject to specific deformation mechanisms: stress-induced martensitic transformation, reorientation twinning, plastic twinning… These mechanisms give rise to very specific mechanical behaviors: shape memory effect, superelasticity, and TRIP and\/or TWIP alloys. <\/p>\n

To gain a better understanding of these often concurrent mechanisms, my approach involved studying the sequence of deformation mechanisms in metastable \u03b2-titanium alloys. I then focused on the relationships between an alloy\u2019s chemical composition and its deformation mechanisms before expanding my analysis to other alloys undergoing martensitic transformation. <\/p>\n

Another part of my work involves developing solutions to problems caused by the behavior of metal alloys in additive manufacturing. Depending on the metals in question, the issues vary: reduced mechanical properties, anisotropy resulting from solidification behavior, heat accumulation, etc. <\/p>\n

Original solutions are proposed by operating at the interface between materials science and process engineering. This approach enables a detailed understanding of the relationships between process, microstructure, and the properties of metals, and helps overcome scientific and technological barriers. <\/p>\n

Keywords<\/strong>: titanium alloys; wire arc additive manufacturing; metallurgy; microstructure<\/p>\n

\n
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