Effect of Isothermal Holding Temperature on Globularization of Primary Solid Phase in Multiplex-Type Slurry Cup

Suk Won Kang; Dock Young Lee; Ki Bae Kim

doi:10.4028/www.scientific.net/SSP.116-117.239

Paper Titles

Design of Experiments for the Optimization the Process Parameters of Thixotropic Aluminum Alloy
p.221

Phase Segregation Susceptibility of ZA27 Alloy at Different Shear Rates
p.225

In-Situ 3D Investigation by Fast X-Ray Microtomography of the Microstructural Changes Occurring during Partial Remelting of Al-Cu Alloys
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The Effect of Differential Speed Rolling on Microstructure and Mechanical Properties of an AZ31 Alloy Sheet
p.235

Effect of Isothermal Holding Temperature on Globularization of Primary Solid Phase in Multiplex-Type Slurry Cup
p.239

Optimization of Manufacturing Conditions of Semi-Solid Slurry in Multiplex-Type Slurry Cup
p.243

A New Deformation-Semi-Solid Casting Process of Highly Concentrated Fe Containing Al-Si-Cu-Fe Cast Alloys
p.247

Microstructural Evolution of AZ31 Mg Wrought Alloy during Partial Remelting for Thixoextrusion
p.251

Dynamic Characteristics of the Sinter-Forged Cu-Cr Alloys with the Variation of Chrome Content
p.255

HomeSolid State PhenomenaSolid State Phenomena Vols. 116-117Effect of Isothermal Holding Temperature on...

Effect of Isothermal Holding Temperature on Globularization of Primary Solid Phase in Multiplex-Type Slurry Cup

Abstract:

In order to produce a high quality and cost effective part in the rheocasting process for an automobile industry it has been important to develop a slurry-on-demand process, which can manufacture the semi-solid slurry having a fine and globular structure of primary solid phase. The morphology of primary solid phase of semi-solid slurry is coarsened and globularized during an isothermal holding process in a solid-liquid region. Accordingly, in this paper, the microstructural evolution of semi-solid slurry during the isothermal holding at a various temperature in solid-liquid region was investigated to examine a coarsening and globularization behavior of primary solid phase. The semi-solid slurry of Al alloy was produced in a slurry maker using a multiplex-type slurry cup that we developed recently. A size of primary solid phase was the finer at the higher holding temperature, but under a constant holding time a roundness degree of primary solid phase was the lower at the lower holding temperature. Also, a coarsening rate of primary solid phase was not considered to be affected significantly by a holding temperature even though a little lower coarsening rate was obtained at the higher holding temperature.