Effects of Modes and Extent of Rolling on The Evolution of Cold Rolling Texture in Alloy Ni-16Cr-16Mo and Its Correlation with The Textures of Alloys Ni-16Cr and Ni-16Mo

Abstract

In the present study, the evolution of textures in alloys Ni-16Cr-16Mo, Ni-16Cr and Ni-16Mo have been compared while imposing equivalent level of rolling reductions (30, 50 and 90 pct.) and modes of deformation (unidirectional, two-step cross rolling and multistep cross rolling) by cold-rolling. An attempt has been made to see whether any of the two binary compositional subset of alloy Ni-16Cr-16Mo has some dominance over the other in the evolution of texture in Ni-16Cr-16Mo alloy or not. Based on these texture evolution study, the effect of alloying elements Cr and Mo on the evolution of texture under different modes of deformation by rolling have been estimated. The element Mo has prime influence on development of cold-rolling texture of the alloy Ni-16Cr-16Mo at 30 pct. rolling reduction in unidirectional and two-step cross-rolling modes of deformation while the element Cr controls the texture evolution at 50 and 90 pct. rolling reductions. The elements Cr and Mo in alloy Ni-16Cr-16Mo play compromising role in the evolution of texture in multistep cross-rolling mode of deformation at 30 pct. rolling reduction whereas at 50 and 90 pct. rolling reductions these elements display a complex effect on development of texture. The development of {111}-fibre in alloy Ni-16Cr-16Mo depends upon the constituent elements, SFE of alloy, modes and extent of deformation. The element Cr favours the formation of {111}-fibre irrespective of the rolling reductions and modes of deformation while the element Mo suppresses the evolution of {111}-fibre in all the modes and extent of rolling except at lower rolling reduction in cross-rolling modes.