A Review on the Effect of Mechanical and Thermal Treatment Techniques on Shape Memory Alloys

Abstract

Despite of many interesting behaviors and attractive properties of Shape memory alloys (SMAs), there are some drawbacks and limitations that prevent them from being used in technology. But there are some treatment techniques that can be used to improve the behaviors of shape memory alloys. Also, they can remove or reduce the limitations of SMAs. In this study both and mechanical treatment techniques (Ball- and Roller-Burnishing Treatment, Surface mechanical attrition treatment, and Laser shock peening) and heat treatment techniques (Annealing, Normalizing, Hardening, and Tempering) have been clarified. And the effect of both treatment techniques of the properties of shape memory alloys have been reviewed.

Influence of Cu Concentration on Structure, Mechanical Properties and Corrosion Resistance of Ti–Ni–Cu Shape Memory Alloy Ribbons

“…Therefore, increasing Cu concentration leads to an increase in tensile strain and elastic modulus. 19,25) Table 3 shows the values of Vickers hardness with increasing Cu content of TiNiCu alloy ribbons. It is evident that the addition of Cu decreases slightly the hardness of the TiNi alloy ribbons from 398 HV (for x = 0) to 318 HV (for x = 20).…”

“…The addition of Cu to the binary TiNi SMAs reduces the transformation temperature hysteresis, enhances the shape memory properties, improve the mechanical properties, stability of thermal characteristics and fatigue life. 18,19) The TiNiCu SMAs have the narrowest temperature hysteresis, which can be used for applications as an actuator, and biomedicine+ S.H. Mohammed et al studied the transformation behavior of equiatomic TiNi and TiNiCu shape memory alloys.…”

“…C. Craciunescu et al showed that the corrosion resistance of the Ti 50 Ni 25 Cu 25 alloy ribbons is better than that of the Ni 50 Ti 50 alloy ribbons because the presence of copper increases the thickness of the oxide layer on the surface. 29) Thus, the obtained results for the TiNi alloy ribbons are still divergent such as hardness, 18,23) temperature hysteresis, 19,24) shape recovery strain 21,26) + and systematic studies for them are needed. In this work, we investigated the influence of Cu concentration on structure, mechanical properties and corrosion resistance of the Ti 50 Ni 50¹x Cu x (x = 0, 5, 10, 15 and 20) alloy ribbons prepared by using the melt-spinning method.…”

A Review on Comparison between NiTi-Based and Cu-Based Shape Memory Alloys

“…SMAs have two various phases and three various crystal structures (i.e. austenite, (detwinned and twinned) and martensite )) [6,7]. The martensite structure and austenite structure are stables at low temperatures and higher temperatures respectively.…”

A Review on Measurement of Radon Gas Concentration in Drinking Water

“…Just as Materials used in biomedical technology must have biocompatibility properties to be able to adapt to the living organisms in which they are used without causing side effects such as smart materials and biomaterials. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], Similarly, water used for both drinking and technology and production must be ensured to be clean and fit for use . However, pollution and the mixing of some harmful radiation substances in water often pose a threat to the use of water for some daily needs.…”