Automatic grain size measurement in low carbon steels by image analysis

Abstract

Grain size measurement using automatic image analysis is performed on low carbon steels from SOLLAC. This method allows the assessment and the improvement of the mechanical properties of our steels. The questionable reproductibility of manual methods is overcome. The quality of the system has been tested using a statistical approach. It allows to give very accurate results (2% in relative value) of the mean linear intercept, which describes the grain size.