Modifying Thermal and Structural Characteristics of CuAlFeMn Shape Memory Alloy and a Hypothetical Analysis to Optimize Surface-Diffusion Annealing Temperature

The effect of annealing temperature（300-600°C）on the microstructure and transformation temperature of NiTiNb shape memory alloy rods deformed with equal channel angular pressing（ECAP） method was analyzed. The results show that the hard brittle phase （Ti,Nb）2Ni was decreased after ECAP. With the rising of annealing temperature, the number of β-Nb phase increase while eutectic declines. The DSC analysis shows that the martensite and reverse transformation temperature increase with annealing temperature. After annealing with 500°C, the martensite/austenite transformation starting temperatures rise to -64.6°C and -30.1°C, respectively.

Download Full-text

Influence of Diffusion-Annealing Temperature on the Physico-Mechanical Properties of Au-doped Bi-2223 Superconductors

Journal of Superconductivity and Novel Magnetism ◽

10.1007/s10948-010-0998-z ◽

2010 ◽

Vol 24 (1-2) ◽

pp. 381-390 ◽

Cited By ~ 11

Author(s):

O. Ozturk ◽

C. Terzioglu ◽

I. Belenli

Keyword(s):

Mechanical Properties ◽

Annealing Temperature ◽

Diffusion Annealing ◽

Diffusion Annealing Temperature

Download Full-text

An effective research for diffusion annealing temperature and activation energy in Au surface-layered Bi-2212 ceramic composites

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-017-7707-7 ◽

2017 ◽

Vol 28 (23) ◽

pp. 17693-17701

Author(s):

Y. Zalaoglu ◽

G. Yildirim

Keyword(s):

Activation Energy ◽

Annealing Temperature ◽

Ceramic Composites ◽

Diffusion Annealing ◽

Diffusion Annealing Temperature

Download Full-text

Behaviour of Superelastic Nickel Titanium Shape Memory Alloy Material under Uniaxial Testing and its Potential in Civil Engineering

MATEC Web of Conferences ◽

10.1051/matecconf/201820306005 ◽

2018 ◽

Vol 203 ◽

pp. 06005

Author(s):

Azmi Mohammad Hassan ◽

Raizal Saifulnaz Muhammad Rashid ◽

Nazirah Ahmad ◽

Shahria Alam ◽

Farzad Hejazi ◽

...

Keyword(s):

Shape Memory Alloy ◽

Shape Memory Alloys ◽

Shape Memory ◽

Smart Materials ◽

Structural Characteristics ◽

Nickel Titanium ◽

Life Extension ◽

Structural Safety ◽

Structural System ◽

Finish Temperature

Smart structures are defined as structures that able to adapt and maintain structural characteristics in dealing with changes of external disturbance, environment and unexpected severe loadings. This ability will lead to improve structural safety, serviceability and structural life extension. Shape memory alloys is one of the smart materials which has potential to be integrated in structural system to provide functions such as sensing, actuation, self-adapting and healing of the structures. The unique characteristic of shape memory alloys material is the ability to ‘remember’ its original shape after deformation. Nickel Titanium superelastic shape memory alloy wire is popular and widely used in many engineering fields and owned fully recovery of maximum strain of 6%-13.5% which is among the best shape recovery limit in alloy materials. The austenite finish temperature plays important role in stress-strain behaviour of superelastic shape memory alloys where higher stress required to complete martensite transformation with the increase of austenite finish temperature. The similar behaviour also is observed in the case of higher strain rate. The behaviour of superelastic shape memory alloys need to be studied before implementing in the structural system, so the targeted improvement for the structural system can be achieved.

Download Full-text