A study of the functional properties of alloy Ti - 45% Ni - 10% Nb with wide hysteresis of the martensitic transformation

• Published in: Metal science and heat treatment 2000-10, Vol.42 (9-10), p.353-356
• Main Authors: UDOVENKO, V. A, POTAPOV, P. L, PROKOSHKIN, S. D, KHMELEVSKAYA, I. Yu, ABRAMOV, V. Ya, BLINOV, Yu. V
• Format: Article
• Language: English
• Subjects: Clutches; Cooling; Coupling; Deformation; Dismantling; High temperature; Hysteresis; Martensitic transformations; Metallurgy; Nickel; Niobium; Recovery; Room temperature; Shape memory alloys; Titanium base alloys
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/bf02725314

Conclusions1. Shape-memory alloy Ti - 45% Ni - 10% Nb with a wide hysteresis of the martensitic transformation can be used for thermomechanical coupling of pipelines. Disassembled thermomechanical clutches can be stored at room temperature and assembled with heating to a temperature somewhat exceedingtroom; the joint can be easily disassembled by RSME under deep cooling.2. Treatment of alloy Ti - 45% Ni - 10% Nb by the recommended method provides the following characteristics of shape recovery: a reversible deformation of high-temperature SME of up to 8%, a degree of shape recovery of up to 60–80%, a temperature range of shape recovery from + 30 to + 90°C, and a reversible deformation of the RSME of 1–2%.3. The deformation that induces the SME in the considered alloy can be performed from −10 to −70°C at ε=10–12%; the thermomechanical clutches can be stored at a temperature of up to +30°C; the parts can be coupled with the help of a thermomechanical clutch in a temperature range from +30 to +100°C. The coupling is easily detachable after deep cooling due to the realization of the reversible SME.