List of Speakers SYMPOSIUM: Light Metals for Transportation

More documents

Recommendations

Info

hosted byOctober 27-31, 2013, Montreal, QuebecList of SpeakersRevised: Monday, April 22, 2013SYMPOSIUM:Light Metals for TransportationFabrication and characterization of Al-based In Situ Composites Reinforced by Al3V Intermetallic CompoundsID: 72824Type: PosterSpeaker: Abdel-Nasser Omran, Faculty of Engineering-Al-Azhar university, EgyptAuthor(s): A. OmranAl-V insitu composite reinforced by sub-micron size Al3V intermetallic compound has been obtained using new technique.The insitu Al3V intermetallic compound was homogeneously embedded in the Al matrix. The produced composites wereexamined using XRD, SEM, EDS, DTA, light microscopy and hardness testing. The results indicated that , the recovery ofvanadium in the prepared composite is reached up to 8% and the maximium efficiency of the V recovery up to 80% havebeen achieved. Also, it has proved certainly by introducing many evidence using XRD, SEM, EDS, DTA and X raymapping that, this compound is Al3V intermetallic compound. According to DTA analysis, the reduction reaction isexthothermic reaction at temperature more than 600oC and the bath temperature uncontrolled reached up to 1000oC.The presence of Al3V compound in the aluminium matrix enhanced and improvement the hardness of the preparedcomposite.Factors Influencing Alpha Case Thickness with Calcia Stabilized Zirconia Face Coat Shelling System forInvestment Casting of Ti 6Al-4VID: 70866Type: ContributedSpeaker: Guy Morin, Centre de métallurgie du Québec, CanadaAuthor(s): G. Morin, G. Marin, M. Comptois-Parr, L. ForgetCalcia stabilized zirconia (CSZ) base slurries have become widely used in titanium investment casting foundries due tothe combination of a limited metal shell reaction and a good average slurry life. However, tight control of slurriesparameters and dipping sequence are required to minimize alpha case.The paper describes the relations between theshelling process parameters and the alpha case formation for titanium alloy Ti 6Al 4V. Impact of the number of appliedCSZ prime coats, the composition of prime stuccos, the colloidal silca content on the first intermediate coat, the shell moldpreheating temperature and the casting cross section have been evaluated.The results showed that a good control ofprocess parameters could limit the alpha case below 180 microns for a 6,35 mm casting thickness. It was found that shellmold temperature, metal temperature and prime coat thickness had the most influence on alpha case formation.Flow Forming of Automotive Spline PartID: 72152Type: ContributedSpeaker: Yong-Nam Kwon, Korea Institute of Materials Science, Korea SouthAuthor(s): Y. Kwon, E. ParkFlow forming is an incremental forming process in which rollers are used to form cylindrical parts with repeated turning ofboth roller and starting material. Even though both sheet and tube can be used as the starting material, flow forming ishighly useful for producing hollow shaped parts from a tube because the average strain in the final shape can besignificantly lowered by using a tube than a sheet material. In the present study, the flow forming process for producing anautomotive spline part from high strength steel was optimized by numerical analysis. Then, flow forming experiment wasfollowed to verify the calculated design. With these numerical analyses and experiments the advantage as well aslimitation of flow forming could be embodied.Page 6 of 17
hosted byOctober 27-31, 2013, Montreal, QuebecList of SpeakersRevised: Monday, April 22, 2013SYMPOSIUM:Light Metals for TransportationFurther Improvement of Aluminium Reduction Cell Resistance Slope CalculationID: 72630Type: ContributedSpeaker: Marc Dupuis, GéniSim Inc, CanadaAuthor(s): M. DupuisAssuming that the cell is not excessively muck and hence that the evolution of the cell resistance is mostly dictated by theevolution of the concentration of the dissolved alumina in the bath, it is fair to say that culculating the slope of that cellresistance is an exact science.During the underfeeding regime from the lean side of the cell voltage vs aluminaconcentration curve, the gradual increase of the slope of the cell voltage is well known and the added bubble and MHDdriven cell voltage noise is very well known.Hence finding the optimal numerical algorythm to filted out that noise andcalculating the current noise free cell resistance slope is a straith forward proposal. In the past the limited C.P.U. power ofcell controler may have prevented the usage of such an algorythm, but this is no longer a limitation.Grain Refinement of Magnesium Alloys Using Ti-B, Ti-C and Al-B based additions: A ReviewID: 73104Type: ContributedSpeaker: Abdallah Elsayed, Ryerson University, CanadaAuthor(s): A. Elsayed, S. Lun Sin, C. RavindranGrain refinement is an effective method to improve the strength of an alloy. For Mg alloys containing Al, there is no widelyaccepted grain refiner. Current methods typically involve melt superheating or addition of carbon based materials such asgraphite, C2Cl6 and SiC. While effective, carbon inoculation methods are inconsistent and the mechanisms are unclear.Another class of grain refiners based on Ti-C, Ti-B and Al-B was recently introduced. This paper discusses thepreparation of these new refiners as well as their grain refining efficiency and resulting mechanical properties. In addition,focused areas for further research are highlighted.Grain Structure Evolution in Aluminium to Steel Ultrasonic Spot WeldingID: 71361Type: ContributedSpeaker: Farid Haddadi, Postech University, Korea SouthAuthor(s): F. Haddadi, P. PrangnellTraditional methods, such as resistance spot welding (RSW), are difficult to apply to aluminum to steel dissimilar weldingin multi-material automotive body structures because of the rapid growth intermetallic layer in liquid state. In comparison,ultrasonic welding (USW) uses only ~5% of the energy of RSW. Here, a detailed investigation has been performed totrack the grain structure evolution in weld interface of the thermomechanical affected zones (TMAZs) using high resolutionSEM fitted with HLK EBSD system. In aluminium to un-coated steel welds severe deformation was found to occur early onin the process, close to the join line, leading to the development of a fine grain structure by dynamic recrystallization.However, the evolution of the grain structures was seen to be delayed with zinc coated steel due to the lowertemperatures and deformation that resulted from liquation of the zinc coat at the weld interface.In-Situ Scanning Electron Microscopy (SEM) Observations of the Deformation Behavior of Friction Stir WeldedAl2139-T8ID: 71549Type: ContributedSpeaker: Carl Boehlert, Michigan State University, USAAuthor(s): C. Boehlert, T. Sano, C. ChenPage 7 of 17
Page 1 and 2: hosted byOctober 27-31, 2013, Montr
Page 5: hosted byOctober 27-31, 2013, Montr
Page 17: hosted byOctober 27-31, 2013, Montr

List of Speakers SYMPOSIUM: Light Metals for Transportation

Create successful ePaper yourself

Delete template?

Save as template?