The presented work is focused on the determination of elastic constants of selected alloys of the systems Ni-Ti andNi-Ti-Cu with use of ultrasonic methods. Sample preparation was carried out using VIM in graphite crucible in combinationwith pouring into graphite mould. The prepared samples were appropriately heattreated, polished into thedesired shape and subjected to measurement of density and then to ultrasonic measurements. In addition to conventionalmethods, such as mechanical tests, also less known methods are applied. Among the specifi c methods wecan mention dynamic mechanical analysis, dynamic super microhardness measurement, electro acoustic resonanceor ultrasonic test.The group of thus tested materials includes also Ti alloys.
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