Study of Compression Behaviour of a Cu-13Al-4Ni-xCr Shape Memory Alloys Prepared by powder metallurgy process | ||
| Journal of University of Babylon | ||
| Article 1, Volume 25, Issue 1, February 2017, Pages 145-156 | ||
| Authors | ||
| Abdul Raheem K. Abid Ali; Aseel Safee hamza | ||
| Abstract | ||
| In this study (Cu-13Al-4Ni-xCr) shape memory alloys have been prepared by using Powder metallurgy technique with added Cr element (x=0.3,0.6,0.9) . After compacted , sintering process has been done in vacuum pressure (10-4torr) at ( 550oC for 120 minute) and ( 900oC for 60 minute) then cooling inside furnace.Quenching heat treatment carry out at (850oC for 60 minute) then cooling in cold water to (3-4oC) . The microstructure has been studied by optical microscope and scanning electron microscope (SEM) , porosity , compression behavior(stress-strain) for quenched specimens also have been studied . The results have been approached that the hardness increases with percent chrome while the porosity decreases . The compression stresses to fracture , have been increased with respect to (0.3%C) had porosity (27%) and decreased for (0.9%) has porosity (22%) . from the previous results , quenched alloy (Cu-13%Al-4%Ni-0.3%Cr) is the more compression strength | ||
| Keywords | ||
| Shape memory alloys; powder metallurgy; CuAlNi; Compressibility; mechanical behavior | ||
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