Abstract Shape memory alloy (SMA) materials possess complete superelasticity or pseudoelasticity above the austenite finish temperature (Af) and many unique mechanical, thermal, thermal–mechanical and electrical properties compared with other conventional materials. Many studies have reported that the superelastic and hysteresis properties of SMA materials can absorb energies coming from extern...

Due to the large reversible strains achievable through the stress-induced austenite-martensite phase transformation in NiTi alloys, NiTi has replaced stainless steel in the majority of large-strain biomedical applications such as root canal enlargement. However, the pseudoelasticity of NiTi is currently overshadowed by the short fatigue life of NiTi wires used in this low cycle (200-2000 rpm), ...

OBJECTIVES The shape memory resulting from the superelasticity and thermoelastic effect is the main characteristic of thermally activated NiTi archwires and is closely related to the transition temperature range (TTR). The aim of this study was to evaluate the TTR of thermally activated NiTi archwires commercially available. MATERIAL AND METHODS Seven different brands of 0.019" x 0.025" therm...

An experimental arrangement is demonstrated that overcomes some difficulties in thermo–mechanical testing of thin Shape Memory Alloy (SMA) wires under uniaxial tension. It is now well known that stress–induced transformations in some SMAs under uniaxial loading can lead to mechanical instabilities and propagating phase transformation fronts. Critical parameters, such as nucleation barriers are ...

In this study, small fraction of NiTi (5 wt%) was added to Yttria stabilized zirconia (YSZ) top coat to improve it sliding wear resistance. The measurement of width of wear tracks after wear tests under a 15 N load for 100 m sliding distances showed that the width of wear track in NiTi-YSZ coating is shorter than that in YSZ coating which depicts the higher wear resistance of NiTi-YSZ coa...