Abstract
Recent interest in metals and alloys with ultra-fine grained (UFG) structure (grain size d. ≤1 μm) can be attributed to their extraordinary physical and mechanical properties [1–3]. This structure can be developed in materials produced by conventional cast metallurgy by thermomechanical treatment, including severe plastic deformation. The most widely used deformation methods are multi-step forging (MSF), torsion under the compression (TUC) and equal-channel angular pressing (ECAP) [2–4]. The present paper describes some aspects of the influence of deformation mode on the formation of UFG structure and the structure-properties dependence of aluminium alloys processed to the UFG state.
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