抄録
In this paper, surface roughness of stainless steel SUS316NG used for piping systems of nuclear power plants is measured after the stainless steel is subjected to a several amounts of plastic deformation up to 18%. The two types of surface roughness such as line(1D) roughness and area(2D) roughness are measured by using the 3D color laser microscope. The 2D roughness in a crystal is also measured. The measurements show that there is a difference in 1D roughness due to the location of measurements of the specimen after deformation, while the value of the 2D roughness does not vary due to the location. It can be also found that the 2D roughness is well proportional to the plastic deformation. The linear relationship between the 2D roughness and plastic deformation can be also seen in small strain range under a few percents, which suggests that a possibility to estimate the plastic deformation using measured surface roughness.
