THE STRENGTH OF AMORPHOUS AND NANOCRYSTALLINE FEMOSIB ALLOYS

The nanocrystalline FeMoSiB alloys with different grain sizes were pre pared during the crystallization of their amorphous solids. The ultima te tensile strength (UTS) and fatigue strength of amorphous and nanocr ystalline materials were measured and compared with each ether. It is found that the ratio of fatigue limit over UTS of amorphous materials reaches the minimum and the maximum fatigue limit can be obtained in o ne of these nanocrystalline materials. Abnormal Hall-Fetch relation wa s also observed in these nanocrystalline materials.