Microstructural evolution and mechanical properties of nanostructured Cu-Al-Ni shape memory alloys |
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Authors: | M Izadinia K Dehghani |
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Institution: | 1.Mining and Metallurgical Engineering Department,Amirkabir University of Technology,Tehran,Iran |
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Abstract: | The melt spinning technique, with an applied cooling rate of about 106 K/s, was used to produce a nanostructured Cu+13.2Al+ 5.1Ni (in wt%) shape memory alloy. The properties of nanostructured
ribbons were then compared with those of conventional coarse structure. The microstructural evolution was characterized using
scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray diffraction (XRD) techniques. Microhardness measurements
indicate a two-fold increase in hardness because of the produced nanostructure. Comparing to its coarse structure, the nanostructured
Cu-Al-Ni shape memory alloy exhibited the enhanced mechanical properties including a ductility of 6.5% and a pronounced plateau
in the stress-strain curve. |
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Keywords: | |
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