Microscopic Observation and Statics Consideration of Tensile Fracture of TiC Coating on Stainless Steel

抄録

We have measured the tensile fracture properties of the TiC coated SUS316L stainless steel, applying a stress perpendicular to the plane of interface between the coating and the substrate. The fracture of the as grown or non-an-nealed specimens occurred partially within the TiC layer. A tensile fracture of the TiC coated specimens after vacuum annealing at about 1373K(1100°C) presented arc-shape curved fracture surfaces which can be understood by statics consideration taking into account the maximum stress plane theory and the residual thermal stress. The strengths of non-annealed and annealed specimens are 34.4MPa(350kgf/cm²) and 30.2MPa(308kgf/cm²), respectively, expressed in terms of Weibull's 50% fracture stresses.