Effect of added and impurity elements on rolling and recrystallization textures of Fe-Ni alloys

Abstract

The effect of small quantities of foreign atoms on rolling and recrystallization textures of 50-65Ni-Fe alloys was investigated. Rolling textures were examined by measuring simultaneously several parameters of X-ray pole figures. The recrystallization textures were determined from conventional X-ray pole figures. Two effects of foreign atoms were observed that were not attributable to the variation of stacking fault energy. During primary recrystallization competition between nuclei {001} <100> and {358}<835> was considerably influenced by the atmosphere of annealing, suggesting that foreign atoms altered the orientation dependence of the mobility of grain boundaries. Surface-active added elements, on the other hand, influenced rolling texture and completely changed the primary recrystallization texture in materials with a very low non-metallic impurity content. The observed recrystallization textures were in accordance with Dillamore's concept based on impurity stabilization of stacking faults. The addition of oxygen suppressed these effects; rolling and recrystallization textures were very similar to those of commercial purity materials. Secondary recrystallization did not’ occur in primarily recrystallized matrices containing only a weak cube component as a consequence either of a purifying atmosphere or of surface-active added elements.