List of Speakers SYMPOSIUM: Light Metals for Transportation

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hosted byOctober 27-31, 2013, Montreal, QuebecList of SpeakersRevised: Monday, April 22, 2013SYMPOSIUM:Light Metals for TransportationPot-To-Pot Busbars Thermoelectric ModelID: 72282Type: ContributedSpeaker: Sébastien Guérard, Rio Tinto Alcan, CanadaAuthor(s): S. Guérard, D. OuillonBusbars are used in the aluminum reduction technology to carry current from the cathodic bars of a cell to the anodicassembly of the next one. The electric and thermal performances of these conductors are essential to the smelteroperations.In this work, a thermoelectric finite model of the AP3X and AP6X conductors is presented. The model canrepresent both normal and bypassed configurations, with no limits to the number of pots considered. It is also fullyparameterized, allowing the inclusion or exclusion of the risers, anode beam, cathodes, equipotential wedges, auxiliarybridges, and radiative impact of the nearby shells.The model can be used to assist in amperage creep project, to gaininsight into the operation of the busbars, to assess potential scenarios, and to help consider alternative designs. It hasbeen extensively validated based on experimental measurements from several plants.Practical Use of Fluid Flow and Solidification Modeling in the Shape Casting of Light MetalsID: 70005Type: ContributedSpeaker: Franco Chiesa, Centre de Métallurgie du Québec (CMQ), CanadaAuthor(s): F. Chiesa, N. Giguère, B. TougasIf fluid flow and heat transfer modeling are now a must in any advanced research where these physical phenomena are atplay, they may also be used to solve very practical quality problems in shape casting foundries. User friendly commercialsoftwares are now available at a price accessible even to small foundries. Two case studies will show how fillingsimulations helped overcome the difficulty in filling thin wall magnesium and aluminium castings poured in sand and lowpressure permanent molds. Solidification modeling is a very potent tool for the prediction of internal shrinkage defects aswill be demonstrated on a magnesium automotive LPPM poured bell housing and on an investment cast titaniumvalve.Modeling can also be used to predict the realistic level of quality achievable by a given process as will be shown onan aluminum sand casting subjected to the ASTM B686 standard of quality.Primary Aluminum Processing in Quebec and CanadaID: 74087Type: InvitedSpeaker: , ,Author(s): R. HarriesThe presentation covers various aspects in the development of primary aluminium processing in Quebec and CanadaQuantification of Primary and Eutectic Undercoolings of Impulse Atomized Al-Cu DropletsID: 70856Type: ContributedSpeaker: Abdoul-Aziz Bogno, University of Alberta, CanadaAuthor(s): A. Bogno, P. Delshad Khatibi, H. Henein, C. GandinRapid solidification undercooling of alloys results in microstructures with reduced microsegregation. Indeed, themetastable extension of solute solubility yields materials with relatively low fraction of eutectic structure. This paperreports on the quantification of primary and eutectic undercoolings resulting from rapid solidification of Al-Cu droplets ofdifferent sizes and compositions obtained by Impulse Atomization. Previous work by some of the authors of this studyPage 12 of 17
hosted byOctober 27-31, 2013, Montreal, QuebecList of SpeakersRevised: Monday, April 22, 2013SYMPOSIUM:Light Metals for Transportationshowed that different combinations of estimated primary and eutectic undercoolings can lead to the same eutecticfraction. The aim of the present study is to use the eutectic fraction values measured by Neutron Diffraction to determinethe right combination of the corresponding primary and eutectic undercoolings and validated using a microsegregationmodel. Thermo-Calc is used for the metastable extension of solute solubility in Al-Cu system. Measurement of heatevolved during the period of recalescence by a microsegregation model showed evidence of heat loss during phasetransformation.SEED Rheocasting : A Reliable Route to Premium Grade Semi-solid FeedstockID: 73166Type: ContributedSpeaker: Pascal Cote, STAS inc., CanadaAuthor(s): P. CoteThe SEED rheocasting technology is a commercially available process used for the production of high quality semi-solidfeedstock. The system is fully industrialized and has been proven robust and reliable. Moreover, it is supported by a teamof scientists, engineers and technicians for operational support and application development.Based on an enthalpyexchange principle combined with a gentle swirling movement, the process delivers clean and oxide free slugs to allow forthe production of high integrity cast parts. While some other rheocasting processes are highly prone to oxide entrapmenteither from mechanical stirring of liquid aluminium or pouring of low solid fraction slurries, the SEED technology focuseson metal cleanliness all along the process from the holding furnace up to the delivery of the high solid fraction billet.Combined with the best practices in semi-solid moulding, the SEED process is a reliable route to advanced casting.Study of Wire Fabrication of Aluminum Treated with Diboride ParticlesID: 72570Type: PosterSpeaker: David Florian-Algarin, University of Puerto Rico Mayaguez(UPRM), USAAuthor(s): D. Florian-Algarin, O. SuarezThe present study focuses on the fabrication of aluminum wires by adding XB2 nanoparticles into an aluminum matrix,where x could be a transition metal, in this case Nb, Mg and Zr. These nanoparticles were obtained by fragmentation in ahigh energy ball mill and then mechanically alloyed with pure aluminum powder. The Al/XB2 pellets obtained were thensintered at 260oC for half hour. Then the sintered pellets were incorporated into molten aluminum. After solidification theingot was cold rolled to obtain 1mm diameter wires with a reduction of area of 96%. The wire specimens weremechanically characterized and their electrical resistivity was measured and compared with pure aluminum. Our resultsdemonstrated the feasibility of improving the mechanical properties of the material without significantly affecting itselectrical resistivity.Superplastic Forming of Friction Stir Welded Magnesium Alloy Sheet.ID: 73681Type: ContributedSpeaker: anthony barnes, Superform usa, USAAuthor(s): a. barnesMagnesium alloys offer opportunities for significant weight savings resulting from their high specific stiffness and strenth.Both the Auto and Aerospace industries benefit from light weight magnesium castings. Sheet metal magnesium alloys areused much less because of their limited room temperature ductility. Superplastic forming (SPF) of magnesium alloys hasdemonstrated remarkable formability and so offers a pathway to greater use of magnesium alloys. There are howeversome limiting aspects of SPFMg; localised thinning in high strain regions and width limitations of currently available MgPage 13 of 17
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