Author : Jassim Mohammed Salman, Abdul Raheem K.Abid Ali and Huda Abbas Kheralla

In this study , Cu-based shape memory alloys of Cu-25Zn-4Al alloy as master alloy have been prepared by powder metallurgy technique in different alloying elements. The addition of alloying elements such as manganese and titanium with (0.5%wt,0.7%wt and 1%wt ) of each element added to the master alloy. After mixing of powders ,compaction stresses of (450,550,650 and 750 Mpa) have been used to compact the master alloy to choose best compress . disc samples (13mm in diameter) and cylinder samples (10mm in diameter ) have been prepared by using 650 Mpa as best compress . then sintering process in vacuum tube furnace has been achieved by three stages ,the first stage is at (350˚C) for 2hr. ,second stage is at (550˚C ) for 1hr. and third stage is at (900˚C) for 3hr. all samples are solution treatment by heating up to (850˚C) for (1hr.) then rapid quenched in (ice water +salt ) . The results obtained from this study have been presented .it found that at 650Mpa the green density is( 6.84g/cm³) and green porosity is 16.88% ,while apparent density and porosity of sintering master sample are (4.731 g/cm³) and (25.95%) respectively . Corrosion results have been shown that corrosion rate decrease with addition Mn% and Ti% addition alloying where the (Cu-25Zn-4Al-1%Mn) alloy has (10.678 mpy) in sintering state while (Cu-25Zn-4Al-1Ti) alloy has (1.732 mpy) in quenching state .

Keywords: Corrosion, Shape Memory etc.

Article published in International Journal of Current  Engineering  and Technology, Vol.4,No.3 (June- 2014)