However, the wear rate of ML (Ni) (25N) between 100 and 12,800 revs is significantly lower, during longer sliding times, probably as a consequence of grain refinement and recrystallization of the copper phase. The 10,000 rev wear scar shows a distinct failure in mechanical properties, as its hardness reduces to ~1.4 GPa. This trend was also observed for its elastic moduli, with values of E rising from ~100 to 120 GPa, before a drop to 39 GPa after 10,000 revs of sliding.