Abstract
Grain-boundary misorientations and mechanical properties of ultrafine-grained (UFG) nickel produced by equal-channel angular pressing are investigated after rolling at a temperature of −196°C. It is shown that cryogenic rolling increases the fraction of high-angle grain boundaries almost two times in UFG nickel. The approach based on electron backscatter diffraction analysis is proposed to estimate the relative energy of high-angle boundaries in polycrystalline metals.
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