Abstract
Recently, because the micro-machine is noticed and electronic equipments are made much lighter and smaller, the demand for micro materials is increasing. However the mechanical properties data of the micro materials obviously run short. Therefore, the establishment of the test method for the micro materials is very necessary. In this study, Cu thin sheets with thicknesses of 10μm and 20μm were used. Specimens were manufactured using electro-spark machining. Afterwards, the machined surface was polished. The fatigue tests were carried out using these specimens. As the results, fatigue lives of specimen with thickness of 10μm were shorter than those with thickness of 20μm in high stress amplitude area. The dispersion in the fatigue life of specimen with thickness of 10μm and 20μm were almost equal.
