Studies of the relationships between process, microstructure, and mechanical properties of metals.
Role of deformation mechanisms and wire arc additive manufacturing.
Abstract: 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.
To gain a better understanding of these often concurrent mechanisms, my approach involved studying the sequences of deformation mechanisms in β-metastable titanium alloys. I then turned my attention to the relationships between an alloy’s chemical composition and its deformation mechanisms before expanding my research to other martensitic-transforming alloys.
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.
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.
Keywords: titanium alloys; wire arc additive manufacturing; metallurgy; microstructure
Studies of the relationships between process, microstructure, and mechanical properties of metals.
: The role of deformation mechanisms and wire arc additive manufacturing
Abstract: 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.
To gain a better understanding of these often concurrent mechanisms, my approach involved studying the sequence of deformation mechanisms in metastable β-titanium alloys. I then focused on the relationships between an alloy’s chemical composition and its deformation mechanisms before expanding my analysis to other alloys undergoing martensitic transformation.
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.
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.
Keywords: titanium alloys; wire arc additive manufacturing; metallurgy; microstructure
