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- W958577163 abstract "Magnesium alloy is a light weight metallic material which offers good engineeringproperties and environmental advantages. Most cast components in this material areproduced by the traditional casting processes, predominantly the die-casting process.The Expendable Pattern Casting Process (EPC process) is a relatively new castingprocess which provides many design, processing and environmental benefits.However, the process differs significantly from the conventional empty mould sandcasting process and there is the need for research to develop an understanding of theprocess parameters.The research was established to provide a preliminary evaluation of the production ofmagnesium base alloy castings by the expendable pattern casting process under gravityand counter gravity pouring. The major process parameters investigated were fillingpressure, pouring temperature and pattern bead density. The problems experienced inapplying this process for this material in the experimental research were defined.Microstructures and mechanical properties of the cast specimens were investigated andreported.The results showed that the quality of test bar specimens produced by the EPC processunder counter gravity pouring with optimised process parameters was compatible withthe quality of castings produced by the conventional sand casting process.In addition to the experimental research a review was conducted of the modelling ofdifferent methods of pouring. The pouring methods considered were bottom gating ingravity pouring, counter gravity pouring in an empty cavity mould process, andexpendable pattern casting processes under both gravity and counter gravity pouring.A quasi one dimensional fluid mechanics analysis was conducted to explain the effectof pattern degradation on the delay in mould filling." @default.
- W958577163 created "2016-06-24" @default.
- W958577163 creator A5051480711 @default.
- W958577163 date "1997-01-01" @default.
- W958577163 modified "2023-09-27" @default.
- W958577163 title "An evaluation of the production of magnesium base alloy castings by the expendable pattern casting process" @default.
- W958577163 hasPublicationYear "1997" @default.
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