Austempered ductile iron (ADI) castings are characterized by having a microstructure of graphite nodules embedded in an ausferritic matrix (bainitic ferrite + high carbon austenite) [1]. The high wear resistance of ADI can be exploited when the loading conditions produce the transformation of high carbon austenite to martensite by the TRIP (Transformation induced plasticity) effect. In this work, boll-on-disk tests were performed in nanostructured ADI alloyed with copper and nickel with variations of the applied load, while the average roughness, number of cycles, body rotation speed, turning radius and temperature were kept constants. The wear mechanisms were analyzed by optical microscopy and scanning electron microscopy (SEM). The results allowed to establish a possible critical load necessary to activate the TRIP effect.