Fig 3 - uploaded by Peyman Asghari-Rad
Content may be subject to copyright.
Microstructure of aluminum A356 alloy: (a) ascast and (b) Forged and rolled and solution-treated at 520℃ for 8 hours.
Source publication
Semi-solid metal forming is a new developing technology that has some advantages in relation to other forming and casting techniques. This process contains three main steps; feedstock manufacturing, reheating and forming. In this study, in order to produce highly strain feedstock from A356 aluminum alloy, a new severe plastic deformation method nam...
Contexts in source publication
Context 1
... microstructure of as-cast A356 aluminum alloy shown in Fig. 3a represents a typical hypoeutectic solidified structure consisting of primary aluminum dendrites and inter-dendritic networks of lamellar eutectic silicon. Aluminum and Silicon phases are represented by blue and red arrows, respectively. Dendritic growth during solidification is apparent, but due to high cooling rate in the metallic ...
Context 2
... and Silicon phases are represented by blue and red arrows, respectively. Dendritic growth during solidification is apparent, but due to high cooling rate in the metallic mold, small dendritic arm spacing is revealed. Since the eutectic phase in A356 alloy in as-cast condition is brittle, it has a tendency to fracture under higher strains. Fig. 3b shows the microstructure of A356 alloy after forging, rolling and solution treating. By applying forging and rolling with subsequent solution annealing on the cast alloy, the lamellar morphology of Si is fragmented into fine particles providing a suitable microstructure to impose higher amount of strains during severe plastic ...
Context 3
... of A356 alloy after forging, rolling and solution treating. By applying forging and rolling with subsequent solution annealing on the cast alloy, the lamellar morphology of Si is fragmented into fine particles providing a suitable microstructure to impose higher amount of strains during severe plastic deformation without crack formation (Fig. 3b). Isothermal treatment at different holding times was carried out to investigate the effect of RCSR process on semi-solid microstructure and globularity of solid particles. Fig. 4 illustrates the microstructure of solution annealed specimen after isothermal reheating at 585℃ for different holding times without applying deformation. ...
