Abstract
The process of equichannel angular pressing (ECAP) is studied with the aim of fabricating large-size preforms with a diameter of 40 mm and a length of 160 mm from alloy 1421 to be used for forming sheets by subsequent warm rolling. Special features of the microstructure and optimum modes of superplasticity and mechanical properties of sheets with ultrafine-grain (UFG) structure are considered.
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