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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3720

Title: T6 heat treatment of semi-solid metal processed alloy A356
Authors: Moller, H
Govender, G
Stumpf, WE
Keywords: Alloy A356
T6 heat treatment
Rheocasting
Arrhenius-type equations
Semi-solid metal
Thixocasting
Materials science
Issue Date: 2008
Publisher: Bentham Science Publishers
Citation: Moller, H, Govender, G and Stumpf, WE. 2008. T6 heat treatment of semi-solid metal processed alloy A356. Open Materials Science Journal, Vol. 2008(2), pp 6-10
Abstract: Semi-solid metal (SSM) processing is a unique manufacturing method to produce near-net shape products for various industrial applications. The aim is to obtain a semi-solid structure free of dendrites (which are formed by conventional liquid casting), with the solid present as nearly a spherical form as possible. This semi-solid mixture (like a gel, or toothpaste) flows homogeneously, behaving as a thixotropic fluid with viscosity depending on shear rate and fraction solid. There are two different SSM processes: thixocasting and rheocasting. With thixocasting, a specially prepared billet of solid material with a globular microstructure is reheated into the semi-solid range and formed. Rheocasting involves preparation of a SSM slurry directly from the liquid, followed by a forming process such as high pressure die casting (HPDC). The increased costs associated with thixocasting (recycling of thixocast scrap and the necessity of an outside manufacturer for billet production) have resulted in rheocasting becoming the preferred semi-solid process.
Description: This is the author's version of the work. It is posted here by permission of Bentham Science Publishers for your personal use. Not for redistribution. The definitive version was published in the Open Materials Science Journal, Vol. 2008(2), pp 6-10
URI: http://hdl.handle.net/10204/3720
ISSN: 1874-088X
Appears in Collections:Metal and metal processes
General science, engineering & technology

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