Internal Friction and Related Properties of the TiNi Intermetallic Compound

Abstract

Internal friction and elastic moduli of the intermetallic compound TiNi were measured as a function of temperature from −170° to 800°C. There appear in the internal friction curve two well-defined peaks at −70° and 600°C, respectively, a small peak at 350°C, and a group of several sharp peaks in the temperature range from −50° to 40°C. The elastic modulus has a positive temperature coefficient in the temperature range from 40° to 520°C. These results are discussed in terms of the crystal-structure model of Wang and others.