the effects of rapid solidification on the microstructure and mechanical properties of al5083

In the present study, bulk refined-structured al 5083 alloy with high mechanical properties was successfully fabricated by hot consolidation process of nanostructured melt- spun flakes. the influence of cooling rate and pressing conditions on the microstructure and mechanical properties of the alloy were investigated using x-ray diffractometer (xrd), optical microscopy (om), field emission scanning electron microscopy (fe-sem), microhardness, and compression tests. rapid solidification combined with the hot consolidation at t=753 k (480 °c) and p= 800 mpa for 20 min produced a bulk sample with the desirable bonding, good microhardness (184.2±12.4 hv), and high strength (273±8 mpa) combined with 7 pct. fracture strain. these amounts are 78.6±5.1 hv, 148 ±9 mpa and about 5 pct. for the as-cast sample. microstructural refinement during the controlled consolidation of nanostructure rapidly- solidified flakes contributes to such high mechanical properties of the bulk sample.