Manufacturing Slurry and Rheocasting of Hypereutectic Al-Si-Cu-Mg Alloy

Yasuhiro Uetani; Nanako Mori; Masayoshi Dohi; Kenji Matsuda; Susumu Ikeno

doi:10.4028/www.scientific.net/MSF.706-709.420

Paper Titles

Superplastic Behaviour of AA5083 Aluminium Alloy with Scandium and Zirconium
p.395

Development of Grain Refinement in Aluminium Field
p.402

Effect of Liquid Hot Isostatic Pressing on Structure and Mechanical Properties of Aluminum Gravity Die Castings
p.408

Effect of Cold Deformation on the Paint-Baking Response of Al-Mg-Si Alloy Sheet for Automotive Body
p.414

Manufacturing Slurry and Rheocasting of Hypereutectic Al-Si-Cu-Mg Alloy
p.420

Effects of Microstructures on Fatigue Behavior of an Al-Mg-Sc Alloy at an Elevated Temperature
p.426

Investigation of Quench Sensitivity of an Al-7.5Zn-1.7Mg-1.4Cu-0.12Zr Alloy
p.431

Deformability of Eutectic Al-Si Alloys Produced by Semi-Continuously DC Casting during Hot-Rolling
p.436

Coatings of Ti and TiO₂ with Defined Roughness for Implants by Gas Flow Sputtering
p.443

HomeMaterials Science ForumMaterials Science Forum Vols. 706-709Manufacturing Slurry and Rheocasting of...

Manufacturing Slurry and Rheocasting of Hypereutectic Al-Si-Cu-Mg Alloy

Abstract:

Both rapid and stable semi-solid slurry preparation of hypereutectic Al-14.8%Si-4.5%Cu-1.1%Mg alloy (in mass%) with fine solid granules as well as finely dispersed primary silicon particles was tried using a simple method newly developed, where the low-superheat melt passes through a gap between a rotating regular octagonal rotor and a circumscribed chill block. By examining effects of melt temperature running out from tundish, gap distance and rotational speed of rotor on solidification structure of the semi-solid slurry manufactured, the optimum making condition of the targeted semi-solid slurry was found out. Mean sizes of solid granules and primary silicon particles within the slurry, which had been made quickly with the good reproducibility, were 45μm and 20μm, respectively. Subsequently the obtained semi-solid slurries were rheocast into a cylindrical shape cavity by the use of a high pressure casting machine. It has been shown that the rheocast samples have peak hardness value between the gravity casting and the hot-extrusion, but a good age-hardenability somewhat higher than that of gravity casting.