Viscosity Estimation of Semi-Solid Alloys by Drop Weight Backward Extrusion Test under High Speed Deformation

S. Ghadiani; Hossein Aashuri; Ali Khosravani; A. Foroughi

doi:10.4028/www.scientific.net/SSP.141-143.379

Paper Titles

Controlling the Semisolid Grain Size during Solidification
p.355

Preparation of Large-Diameter Semi-Solid 7075 Aluminum Alloy Billets
p.361

Study of Microstructural Evolution and Phase’s Morphology after Partial Remelting in A356 Alloy
p.367

Fabrication of Metal Matrix Composites under Intensive Shearing
p.373

Viscosity Estimation of Semi-Solid Alloys by Drop Weight Backward Extrusion Test under High Speed Deformation
p.379

Heat Treatment Processes of A2024 Rheoforging Alloy and Morphology Investigation by Nanoindentation and Atomic Force Microscopy
p.385

Comparison of Microstructural Changes in a SIMA Processed A356 Aluminum Alloy after Unidirectional Compression and Rolling: Effect of Pressure Depth
p.391

Study of ECAP Processing Routes on Semi-Solid Microstructure Evolution of A356 Alloy
p.397

Melt Conditioned Direct Chill Casting (MC-DC) of Wrought Al-Alloys
p.403

HomeSolid State PhenomenaSolid State Phenomena Vols. 141-143Viscosity Estimation of Semi-Solid Alloys by Drop...

Viscosity Estimation of Semi-Solid Alloys by Drop Weight Backward Extrusion Test under High Speed Deformation

Abstract:

A simple method for estimating the apparent viscosity of semi-solid alloys was investigated. A drop weight of 50Kg and backward extrusion equipments were used to test the deformation. Backward extrusion was employed in a closed die system due to the very little separation of liquid from solid phases compared with other methods at very high deformation rate. The half of the calculated impact velocity, 700mm/s was considered as an average velocity for deformation during the test, since the slop of the velocity changes against time is constant in the middle stage of the deformation. The initial height of the sample and the thickness of the residual compressed solid at the bottom of the cup were used to calculate the amount of apparent viscosity of A356 aluminum alloy in this work.