Texture, microstructure and mechanical properties evolution in Fe-x (x = 36 and 48 wt.%) Ni alloy after accumulative roll bonding

Abstract

The texture, microstructure and Vickers microhardness evolution of Fe-36Ni and Fe-48Ni (wt. %) alloys processed by accumulative roll-bonding (ARB) up to 6 cycles were investigated using Electron Back Scatter Diffraction (EBSD) and microhardness measurements. Both alloys underwent a substantial grain refinement. Grains were of elongated shape parallel to the rolling direction and slightly smaller for Fe-48Ni alloy. Both alloys exhibit a different texture evolution upon straining influenced by the deformation conditions. The microhardness of both alloys also showed the same trends up to 6 cycles and Fe-48Ni alloy has higher strength than Fe-36Ni alloy. These differences were mainly ascribed to the deformation conditions, solute pinning and stacking fault energy.