Parmi les alliages de titane, ceux de type β métastable sont les plus prometteurs pour améliorer les performances des matériaux utilisés actuellement dans de nombreux secteurs tels que l'aéronautique ou le biomédical. En particulier, certains alliages de titane β métastable sont sujet à une transformation martensitique induite sous contrainte (vers la phase orthorhombique), qui peut être ajustée afin d'obtenir de la superélasticité ou un effet TRIP (TRansformation-Induced Plasticity). La stratégie de conception de ces alliages transformables par déformation est présentée ici et quelques découvertes majeures récentes sont mises en lumière et discutées.
Amongst titanium alloys, metastable β types are the most promising to improve performances of materials currently used in several sectors such as aeronautics or biomedical applications. Particularly, some metastable β titanium alloys exhibit a stress-induced martensitic transformation (into the orthorhombic phase) that can be tuned to obtain superelasticity or the TRansformation Induced Plasticity (TRIP) effect. The design strategy of such strain-transformable alloys is presented here, and some recent key findings are highlighted and discussed.
Mot clés : Alliages de titane, Phase β métastable, Superélasticité, TRIP, TWIP
Philippe Castany 1 ; Thierry Gloriant 1 ; Fan Sun 2 ; Frédéric Prima 2
@article{CRPHYS_2018__19_8_710_0, author = {Philippe Castany and Thierry Gloriant and Fan Sun and Fr\'ed\'eric Prima}, title = {Design of strain-transformable titanium alloys}, journal = {Comptes Rendus. Physique}, pages = {710--720}, publisher = {Elsevier}, volume = {19}, number = {8}, year = {2018}, doi = {10.1016/j.crhy.2018.10.004}, language = {en}, }
Philippe Castany; Thierry Gloriant; Fan Sun; Frédéric Prima. Design of strain-transformable titanium alloys. Comptes Rendus. Physique, Volume 19 (2018) no. 8, pp. 710-720. doi : 10.1016/j.crhy.2018.10.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2018.10.004/
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