鉄-アルミニウムー窒素合金の再結晶挙動

Abstract

Recovery, recrystallization, and texture-development in cold-rolled sheets of an Fe-Al-N alloy with 0.061% of acid soluble aluminum and 0.0047% of acid soluble nitrogen were studied. Two different initial conditions as for the AIN precipitation were given by quenching the hot-rolled strip into brine water either directly from the hot-finishing temperature or after keeping it at 800°C for 30 minutes so that AIN precipitated completely.Highly developed {111} recrystallization texture was found in the specimen with nitrogen and aluminum initially in solution, while in the course of heating a noticeable retardation of strain recovery occurred. An analysis of X-ray diffraction line broadening showed that the retardation of strain recovery was anisotropic, being most pronounced for grains with the {111} lattice plane parallel to the sheet plane. Such effect was not found in the specimen with AIN precipitated prior to cold-rolling. Comparing the above result with that of transmission electron microscopy, a discussion was made concerning the differences in the annealing behavior and the texture-development.