Ti-Fe-Sn-Nb hypoeutectic alloys with superb yield strength and significant strain-hardening. (1st July 2017)

• Record Type: Journal Article
• Authors: Zhao, Guo-Hua; Ketov, Sergey V.; Mao, Huahai; Borgenstam, Annika; Louzguine-Luzgin, Dmitri V.
• Is Part Of: Scripta materialia. Number 135(2017)
• Page Start: 59
• Page End: 62
• Publication Date: 2017-07-01
• Subjects: Ti-Fe-Sn-Nb -- Hypoeutectic alloys -- Mechanical properties, β-Ti dendrite; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.03.033
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In this letter new Ti-Fe-Sn-Nb hypoeutectic alloy comprised of primary dendritic β-Ti and ultrafine (β-Ti + TiFe) eutectic was developed showing superior mechanical properties. The as-cast Ti67 Fe27 Sn3 Nb3 (at.%) alloy exhibited exceptionally high yield stress (2.18 GPa) comparable to that of bulk metallic glasses. Most importantly, the sample presented significant strain-hardening (320 MPa) and enhanced plasticity. The slip deformation and dislocation accumulation in the β-Ti dendrite contribute to the plasticity and the pronounced strain-hardening, whereas the high strength stems from the ultrafine (β-Ti + TiFe) eutectic structure as well as the solution hardening in the multicomponent system. Graphical abstract: