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Nitinol,a shape memory alloy(SMA),is manufactured from titanium and nickel.It is employed in various fields for use in devices such as micro sensors,ultra-precision devices and satellite wings.It is highly recommended as a material in medical stents for insertion into the body because it has excellent organic compatibility.However,because they are intended to be inserted into the human body,products such as medical stents require a high-quality surface.Because nitinol has more of the characteristics of titanium than of nickel,one of its drawbacks is that heat generated in nitinol during machining is not discharged smoothly,leading to areas of inner stress which occur when traditional machining methods are used.To overcome this difficulty,various non-traditional machining methods,including non-contact machining,have been investigated for use with nitinol.This study is focused on the application of an effective fabrication method that combines electrolytic polishing(EP)and MR polishing to improve the surface integrity of nitinol through a series of experiments.Surface roughness variations of the polished nitinol were investigated by changing the imposed polishing conditions of EP and MR polishing,respectively.Finally,the variations in the surface roughness were observed with polished previously performed via the EP process.
Nitinol, a shape memory alloy (SMA), is manufactured from titanium and nickel. It is employed in various fields for use in devices such as micro sensors, ultra-precision devices and satellite wings. It is highly recommended as a material in medical stents for insertion into the body because it has excellent organic compatibility. Because as are they are intended to be inserted into the human body, products such as medical stents require a high-quality surface.Because nitinol has more of the characteristics of titanium than of nickel , one of its drawbacks is that heat generated in nitinol during machining is not discharged smoothly, leading to areas of inner stress which occur when traditional machining methods are used. To overcome this difficulty, various non-traditional machining methods, including non-contact machining , have been investigated for use with nitinol. This study is focused on the application of an effective fabrication method that electrolytic electrolytic polishing (EP) and MR polishing t o improve the surface integrity of nitinol through a series of experiments. surface roughness variations of the polished nitinol were investigated by changing the imposed polishing conditions of EP and MR polishing, respectively. Finally, the variations in the surface roughness were observed with very little via the EP process.