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Journal of Fundamental and Applied Sciences

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Thermal, electrochemical and mechanical properties of shape memory alloy developed by a conventional processing route

T Ahmad, A.N. Malik, S.S. Raza, M Kamran, M.U. Manzoor, A Salman, F Hussain, F Riaz, R Ahmad, M.N. Akhtar

Abstract


A Cu based shape memory alloy (Cu-Al-Ni) having a composition 83% Cu, 14% Al, 3% Ni, was developed and studied to determine the shape memory effect. Powder of Cu, Al and Ni was melted in a pit furnace at about 15500C, and casted alloy was heat treated at 8500C for a period of 50 minutes followed by water quenching. Microstructure characterization of alloy (Cu-Al-Ni) was carried out to determine the pre-quenched (cast structure) and quenched martensitic structure. The microstructure analysis of developed samples showed needle like structure of quenched martensite after heat treatment. It has a very good resemblance with structure of casted shape memory alloy obtained from the vacuum induction process. The Vickers hardness test was also performed. Quenched microstructure with improved hardness than pre-quenched structure was observed.

Keywords: Shape Memory Alloy, Microstructure, Mechanical Properties




http://dx.doi.org/10.4314/jfas.v9i2.15
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