The Development of Texture in Copper and Copper‐Zinc Alloys

The crystallite orientation distribution function has been determined for cold-rolled copper, copper-10 per centzinc and copper-30 per cent zinc ( α -brass) at cold reductions of 0, 20, 40, 60, 80, 90 and 95 per cent. The coppertexture exhibits a steady development and contains a tube of orientations between limits which have previouslybeen shown to be stable during multiple slip processes ( { 110 } 〈 112 〉to{ 4411 } 〈 11118 〉 ). The textures of thecopper-zinc alloys both show a similar initial development to that of copper but a transition occurs above areduction of about 40 per cent. This indicated that an additional deformation mode had become active. Thefeatures of the transition are consistent with those expected if the additional deformation mode were mechanicaltwinning. The development of the basic texture (pure-metal type) is in agreement with predictions based on theassumption of multiple slip conditions incorporating a considerable amount of cross-slip.