2016 年 2 巻 p. 16-00552
Investigation on the effects of crystallographic surface and sliding orientations of CMSX-4 single crystal Ni-base superalloy (SC) on the cyclic sliding friction (CSF) behavior against IN718 polycrystalline Ni-base superalloy (PC) has been carried out at room temperature and at 600°C. Tests have been conducted on three different surface orientations (crystallographic orientation of sliding surface) and two different sliding orientations (crystallographic orientation toward the sliding direction), in order to explore the anisotropic friction response of SC/PC sliding contact pair. A significant normal load depended anisotropic tribological behavior was observed. On a given contact surface orientation, a specific effect of sliding direction was also established. This anisotropic behavior was found to be significant and was independent of test temperature. Discussions were made on the above experimental results. It was suggested that both the stress and the deformation field near the contact area which are closely influenced by the anisotropic mechanical properties in longitudinal and transverse elastic moduli and in yield strength would play extrinsic roles there.
