en گروه کامپوزیت Composites Research Paper Research Paper <span style="font-size:11pt"><span style="line-height:200%"><span style="text-autospace:none"><span style="font-family:Calibri,sans-serif"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">In the present study, bulk refined-</span><span style="background:aqua"><span style="background-color:#ffffff;">structured</span></span><span style="background-color:#ffffff;"> 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 </span></span><span style="font-family:Symbol"><span style="background-color:#ffffff;">&deg;</span></span><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">C) and P= 800 MPa for 20 min </span><span style="background:aqua"><span style="background-color:#ffffff;">produced</span></span><span style="background-color:#ffffff;"> a bulk sample with the </span><span style="background:aqua"><span style="background-color:#ffffff;">desirable</span></span><b><span style="background-color:#ffffff;"> </span></b><span style="background-color:#ffffff;">bonding, good microhardness (184.2</span></span><span style="font-family:Symbol"><span style="background-color:#ffffff;">&plusmn;</span></span><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">12.4 HV), and high strength (273&plusmn;8 MPa) combined with 7 pct. fracture strain. </span><span style="background:aqua"><span style="background-color:#ffffff;">These amounts are 78.6</span></span></span><span style="background:aqua"><span style="font-family:Symbol"><span style="background-color:#ffffff;">&plusmn;</span></span></span><span style="background:aqua"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">5.1 HV, 148 &plusmn;9 MPa and about 5 pct. for the as-cast sample.</span></span></span><b><span style="background-color:#ffffff;"> </span></b><span style="background:aqua"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">Microstructural </span></span></span><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">refinement during the controlled consolidation of nanostructure rapidly- solidified flakes contributes to such high mechanical properties of the bulk sample.</span></span></span></span></span></span><br> <br> <span style="background-color:#ffffff;">&nbsp;</span> rapid solidification,aluminum alloy 5083,mechanical properties,microstructure,hot consolidation 1 7 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-2480-1&slc_lang=en&sid=1 Maryam Salehi maryamsalehi@iust.ac.ir 1800319475328460017377 1800319475328460017377 Yes School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran Milad Dadashi miladdadashi117@gmail.com 1800319475328460017378 1800319475328460017378 No School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran S. Parsa Kashani Sani parsakashani1999@gmail.com 1800319475328460017379 1800319475328460017379 No School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran,