A phenomenological approach to the quality index of Al-Si-Mg casting alloys

Caceres, C. H. (2000) A phenomenological approach to the quality index of Al-Si-Mg casting alloys. International Journal of Cast Metals Research, 12 6: 367-375.

Author Caceres, C. H.
Title A phenomenological approach to the quality index of Al-Si-Mg casting alloys
Journal name International Journal of Cast Metals Research   Check publisher's open access policy
ISSN 1364-0461
Publication date 2000
Sub-type Article (original research)
Volume 12
Issue 6
Start page 367
End page 375
Total pages 9
Place of publication Sheffield, UK
Publisher Castings Development Centre
Collection year 2000
Language eng
Subject C1
291403 Alloy Materials
671001 Structural metal products
Abstract A simple continuum mechanics model relating the quality index,* Q, to parameters of the deformation curve of alloys A356/357 is presented. The model incorporates the limiting effect of particle cracking on the ductility on a phenomenological base and it is used to predict the behaviour of the quality index as the material is strengthened by either ageing or increased content of Mg. The analysis shows that for every temper there is a matrix strength that maximises the Q-value. For strong alloys the model suggests that peak ageing can reduce Q. This effect is stronger when the ductility of the material is low. The possibility of using the quality index to optimise the combination of the alloy chemical composition and temper is discussed.
Keyword Metallurgy & Metallurgical Engineering
Alloys A356 And A357
Quality Index
Tensile Ductility
Tensile Strength
Eutectic Si
Age Hardening
Metal-matrix Composites
Plastic Relaxation
Silicon Particles
Copper-silica
Deformation
Damage
Particulate
Behavior
Model
Microstructure
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Tue, 10 Jun 2008, 12:20:00 EST