Assessment of Fatigue Life of Ni-Ti Samples Prepared by Different Techniques

Abstract

Ni-Ti alloys have been given a lot of attention, mainly for their innovative use in practical medical applications. These motives led to understand deformation mechanisms, particularly behaviors under fatigue loading. In this research, fatigue life will be investigated for different composition Ni-Ti alloy samples. Three different compositions were investigated under different fatigue loading; Ni52.8Ti47.2, Ni50Ti50 and Ni47.2Ti52.8. These samples were prepared three different techniques, casting, powder-casting and powder-metallurgical techniques. Nondestructive methods have been used to assist revealing further detailed effects of loading on NiTi alloy structure. Ni52.8Ti47.2 has been found to have the best fatigue properties among other compositions.