1990 Volume 30 Issue 7 Pages 546-551
For metallurgical studies or routine control of eutectoid steels, it is necessary to perform automatic measurement of pearlitic interlamellar spacing. Various methods, using a combined system of a scanning electron microscope (SEM) and an image analyzer (IA) have been compared and the optimum procedure has been studied. A conversion coefficient from the apparent spacing measured with SEM+IA system to the true spacing has been determined to be 0.9 with a transmission electron microscope observation on thin specimen.