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Characterization of metal powder based rapid prototyping components with respect to aluminium high pressure die casting process conditions

Published Article / This paper is based on tests performed on die component specimens manufactured by EOS-DMLS (direct metal laser sintering) and LENS (laser engineered net shape) RP (rapid prototyping) technology platforms, as well as manufactured specimens machined out of preferred standard hot work steel DIN 1.2344. These specimens resemble typical components used in metal high pressure die casting tool sets. The specimens were subjected to a programme of cyclic immersion in molten aluminium alloy and cooling in water-based die release medium. The heat checking and soldering phenomena were analyzed through periodic inspections, monitoring crack formation and evidence of surface washout. At the end of the thermal tests, mechanical strength and hardness tests were performed to assess toughness and core resistance variations in relation to the initial conditions. Finally metallographic investigations were performed through optical microscopy on all the specimens considered.
The outcomes of this research will be presented and used by the CSIR for further development and application of the assessed EOS-DMLS and LENS rapid prototyping technologies in rapid die manufacturing techniques and die design principles, including time and economic feasibility criteria to be applied when considering rapid die manufacture.

Identiferoai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:cut/oai:ir.cut.ac.za:11462/563
Date January 2010
CreatorsPereira, M.F.V.T., Williams, M., Du Preez, W.B
ContributorsCentral University of Technology, Free State, Bloemfontein
PublisherJournal for New Generation Sciences, Vol 8, Issue 2: Central University of Technology, Free State, Bloemfontein
Source SetsSouth African National ETD Portal
Languageen_US
Detected LanguageEnglish
TypeArticle
Format2 531 306 bytes, 1 file, Application/PDF
RightsCentral University of Technology, Free State, Bloemfontein
RelationJournal for New Generation Sciences;Vol 8, Issue 2

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