L-grade stainless steels such as 316NG, SUS316L and SUS304L are used for the BWR reactor internals and re-circulation pipes. The L-grade stainless steels are known as typical SCC resistant materials because they are hardly thermally sensitized in usual welding process due to its lower carbon contents. However SCC of the L-grade material components were recently reported. This paper summarizes the recent knowledge and reports about the SCC behavior of L-grade stainless steels and its mitigation and ...
英字タイトル:
Stress corrosion cracking of L-grade stainless steel in high temperture water

A method for an X-ray stress measurement can be classified into the method to determine the orientation angles for measuring the diffraction peak and the method to determine the optimum stress values. In this study, a new method for an X-ray stress measurement using an area detector is proposed and is named ”direct method”. In the direct method, the diffraction ring due to the incident X-ray beam normal to the specimen surface is used. The optimum stress values are determined by a simplex method as a k...
英字タイトル:
A New Method for X-Ray Stress Measurement Using Area Detector

X-Ray diffraction spots from coarse grains of austenitic stainless steel, SUS316L, were measured with an area detector. The error of the measurement of the diffraction angle was investigated.“ -method ”was proposed to solve the error due to the position of the coarse grain. However, the -method was not effective in solution of the error. A double-exposure method (DEM) was proposed as the measurement without error due to the position of the coarse grain. The DEM did not solve the error due to the divergen...
英字タイトル:
A Study on Strain Measurement of Coarse Grains Using X-Ray Area Detector