New beta-type Ti-Fe-Sn-Nb alloys with superior mechanical strength

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 705; pp. 348 - 351
• Main Authors: Zhao, G.-H., Ketov, S.V., Jiang, J., Mao, H., Borgenstam, A., Louzguine-Luzgin, D.V.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 29.09.2017; Elsevier BV
• Subjects: Alloy development; Alloys; beta-stability; Beta-Ti alloy; Crystal defects; Dislocation density; Ferrous alloys; Mechanical properties; Niobium; Plastic deformation; Shear strength; Strain hardening; Strain rate; Strength; Ti-Fe-Sn-Nb; Tin base alloys; Titanium base alloys; Yield stress; β-stability; Mechanical properties; β-stability; Beta-Ti alloy; Ti-Fe-Sn-Nb
• ISSN: 0921-5093; 1873-4936; 1873-4936
• DOI: 10.1016/j.msea.2017.08.060

Ti-Fe-Sn-Nb alloys comprised of single β-Ti phase were developed showing excellent mechanical strength and superior plasticity. The alloys exhibited increased yield strength as a function of Fe content, where the Ti80Fe14Sn3Nb3 alloy presented the highest yield stress (1.88GPa) comparable to that of Ti-based nanocrystalline alloys. Moreover, a significant strain-hardening (520MPa) was achieved along with the plastic deformation. The excellent mechanical strength was enhanced by the supersaturated β-Ti and the high density of lattice defects that restrict the dislocation motion.