Mechanical and functional properties of commercial alloy TN-1 semiproducts fabricated by warm rotary forging and ECAP

• Published in: Russian metallurgy Metally Vol. 2017; no. 10; pp. 890 - 894
• Main Authors: Andreev, V. A., Yusupov, V. S., Perkas, M. M., Prosvirnin, V. V., Shelest, A. E., Prokoshkin, S. D., Khmelevskaya, I. Yu, Korotitskii, A. V., Bondareva, S. A., Karelin, R. D.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2017; Springer Nature B.V
• Subjects: Applied Problems of Strength and Plasticity; Chemistry and Materials Science; Dislocation density; Equal channel angular pressing; Forging; Intermetallic compounds; Materials Science; Metallic Materials; Nickel base alloys; Nickel compounds; Plastic deformation; Properties (attributes); Recoverable strain; Shape memory alloys; Thermomechanical treatment; Titanium compounds; shape memory alloys; equal-channel angular pressing; functional properties; titanium nickelide; rotary forging; thermomechanical treatment
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S0036029517100020

The influence of various thermomechanical treatment schemes, which include rotary forging and severe plastic deformation by equal-channel angular pressing, on the structure and the mechanical and functional properties of TiNi alloys is studied. Treatment according to these schemes is shown to result in the formation of a mixed nano- and submicrocrystalline structure with a high dislocation density, which ensures high mechanical (σ 0.2 = 760–954 MPa, σ u = 917–1097 MPa, δ = 21–51%) and functional (maximum completely recoverable strain of 6.8–8%) properties.