Abstract
Abstract
In this article, Cu45Zr45Ag7Al3 amorphous alloys were prepared by copper mold suction casting method and its three-point-bending fatigue performance were researched. The structural characteristics of the alloy were analyzed using x-ray diffraction (XRD), and the fatigue fracture morphology was analyzed using scanning electron microscopy (SEM). The results indicate that the surface morphology of the three-point-bending fatigue fracture mainly includes three regions: the fatigue crack initiation region, the steady-state crack propagation region with typical fatigue stripes and the final rapidly fracture region. The fatigue crack source is micropores ranging in size from 30 to 50 μm, where numerous shear bands formed. And the fatigue limit of amorphous alloys is 410MPa, which is higher than the four-point-bending fatigue limit.
Funder
Scientific Research Project of Hunan Provincial Department of Education
Hengyang Science and Technology Plan Project
Scientific Research Project of Hunan Institute of Technology
Hunan Provincial Nature Science Foundation
Subject
Metals and Alloys,Polymers and Plastics,Surfaces, Coatings and Films,Biomaterials,Electronic, Optical and Magnetic Materials