G0301602 Fatigue Strength Characteristics for Magnesium Alloy Fine Wire

Abstract

For further miniaturization and lightweight of industrial products and electronic devices are required, the necessity for investigating the mechanical properties of micro-materials such as thin films or fine wires increases. Many researchers have been investigated the mechanical properties of micro-materials. Because researchers use different devices and methods in experiments of mechanical properties, there is little data with high reliability of the micro material. In this study, tensile test and fatigue test were carried out using magnesium alloy AZ31 and AZ61 fine wires with the diameter of 200μm for the establishment of new test method and the accumulation of the mechanical propertied data. As results of tensile tests, the tensile strengths and elongations at break from stress- strain diagram of AZ31 and AZ61. As results of fatigue test, S-N diagrams of AZ31 and AZ61 were obtained. The fracture surfaces of tensile and fatigue test specimens were observed using SEM. Finally, the maximum stress intensity factors were calculated from the size of fatigue crack propagation.