Authors : Hussein A. Hashim, Ali H. Halem and Ansam A. Hashim
Abstract: The effect of various amounts (0.4, 0.7, 1 and 1.5% wt.) of Titanium additions on the dry sliding wear, shape memory effect, hardness and microstructure of Cu-11.9% Al-4.5% Ni SMA were investigated by wear instrument, vickers hardness instrument, SEM and XRD. It was found that the properties of the alloy were highly sensitive to the composition variation. It was observed from SEM image that the alloy without the addition lead to form platelet like martensite phase (• •) while with addition of Titanium lead to form needle like martensite phase (• •). It is shown that the wear rate of Cu-1l.9% Al-4.5% Ni increases with increasing time and when added (1% wt.) Ti, the wear rate then decreases with increasing time. This is mean that the addition of titanium increase the wear resistance of the alloy. It was noticed that the hardness of Cu-1l.9% Al-4.5% Ni SMA is 118 g/μm2 and when added (0.4, 0.7, 1, 1.5% wt.) of Ti , the hardness increasing to (132.4, 149, 153.1, 162.3 g/μm2), respectively with Ti addition. It was found that the best SME founded when added 1.5% wt. Ti. This improved that the alloy containing Titanium element has better properties compared with alloy without Titanium.
Hussein A. Hashim, Ali H. Halem and Ansam A. Hashim, 2018. Investigate the Effect of Titanium Addition on the Microstructure, Sliding Wear Resistance and Shape Memory Effect of Cu-Al-Ni SMA Prepared via. Powder Metallurgy. Journal of Engineering and Applied Sciences, 13: 6910-6914.