OS04W0269 Determination of both stress and transformation fraction in deformed dual phase stainless steel using an area detector

Abstract

This paper describes an application of a new type of X-ray stress measurement, which uses whole part of the diffraction ring for determining stress. The method can be also applied for the measurement of both macro and microstresses in composite materials. In case of measuring a dual phase stainless steel, the diffraction rings, which come from both austenitic and ferritic phases, can be recorded on the same area detector when chromium Kα radiation is used. In order to check the validity of the method, the stress obtained by this method was compared with the stress that was applied to the specimen mechanically. A volume fraction of each phase was also determined from the diffraction intensity of the diffraction ring. The present method was applied to analyze an area around a notch tip of a dual phase stainless steel.