Orientation relationships between ferrite and Fe ₄ N nitride in hypoeutectoid iron-nitrogen binary alloy

X.-C. Xiong (1) , A. Redjaimia (1) , M. Gouné (2, 1)

1 LSGS - Laboratoire de science et génie des surfaces
2 ArcelorMittal

In this study, a hypoeutectoid Fe-N binary alloy was prepared by nitriding in autenitic domain at 840 °C. The slow cooling of this alloy led to the Ferrite + Fe4N microstructure which is similar to the pearlite in Fe-C system. This pearlitic microstructure has been characterized by electron microscopy. The crystal structure of Fe4N has been identified by electron microdiffraction. In this pearlitic microstructure, the Nishiyama-Wassermann orientation relationship is developed between the ferrite and the Fe4N nitride.

Domaines: Chimie; Sciences de l'ingénieur [physics]

X.-C. Xiong, A. Redjaimia, M. Gouné. Orientation relationships between ferrite and Fe ₄ N nitride in hypoeutectoid iron-nitrogen binary alloy. X^ème Colloque de la Société Française des Microscopies, GN-MEBA; Cercle Français de Pathologie Ultrastructurale, Jun 2007, Grenoble, France. pp.173-174. ⟨hal-04559997⟩