Abstract
	Alloy containing 40 at. % Ni, 50 at. % Ti and 10 at. % Cu is considered to be a standard shape memory Ni-Ti-Cu alloy. These alloys are highly stable and resistant to corrosion. Fabrication of alloys on the base Ni and Ti is quite difficult due to high reactivity of titanium. The basic requirement to metallurgy of these advanced materials is strict adherence to chemical composition of the alloy, which is the main condition for obtaining of the alloy with the required transformation temperatures. Melting operations are usually realised at the temperature of approx. 1500 °C. For obtaining of wire it is the best to use technology of swaging in combination with subsequent drawing. Transformation temperatures measurement should be realised by DSC method (differential scanning calorimetry) or DTA method (differential thermal analysis), by resistometric methods and also by deformation methods. Observation of microstructure should be realized by optical microscopy, but more effective is use of electron microscopy, such as SEM and TEM respectively. Experimental alloy was prepared in vacuum induction furnace in graphite crucible and then forged and heat treated. The specimens were in the form of wire with diameter 2.3 mm. This article deals with observation of micro-structural characteristics of Ni-Ti-Cu shape memory alloy, after different types of thermal treating by transmission electron microscopy.