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Abstract
Microtextures have been measuredfor compressed and annealed nickel which, since the data arose from contiguous grains, allowed the mesotexture – the texture between grains – to be collated. Nearly 2400 grain boundaries were included in the part of the study reported here. The microtexture and accompanying macrotexture showed a very weak compression fibre texture which became slightly more well defined after annealing. The mesotexture, assessed in terms of proximity to coincident site lattice (CSL) misorientations showed a bias towards low-Σ CSLs (Σ=3 to 15) rather than high-Σ CSLs (Σ=17 to 35). As annealing and grain growth proceeded, Σ=3n boundaries (n=1 to 3) became more prevalent in the mesotexture. A second nickel sample which had been annealed at a high temperature before compression had a mesotexture which was dominated by Σ=3n boundaries. The differences between the two specimens was attributed to differences in impurity levels.
MST/1307
