ENCYCLOPÉDIE DE LA RECHERCHE SUR L’ALUMINIUM AU QUÉBEC 2013 | Page 14

12 PRODUCTION D’ALUMINIUM ALUMINIUM PRODUCTION COMPORTEMENT EN DÉFORMATION DE LA BARRE COLLECTRICE D’ACIER DE LA CATHODE DURANT L’ÉLECTROLYSE DEFORMATION BEHAVIOUR OF THE CATHODE STEEL COLLECTOR BAR DURING ELECTROLYSIS Industrial Research Chair MACE3 and Aluminium Research Centre – REGAL, Laval University, Quebec, QC, Canada G1V 0A6 2Department of Civil and Water Engineering, Laval University, Quebec, QC, Canada G1V 0A6 3Department of Mining, Metallurgical and Material Engineering, Laval University, Quebec, QC, Canada G1V 0A6 1NSERC/Alcoa This poster communicates the preliminary results of investigations carried out on the deformation profile and mechanical properties of the cathode collector bar at conditions experienced within the aluminum reduction cell during electrolysis. • Effect of corrosion and metal loss at test conditions • Effect of thermal expansion and phase change • Creep behaviour at constant temperature 900 oC and constant stress at 2 MPa Compressive Creep Test Compressive creep test on AISI 1006 in a three zone resistance furnace of flowing argon atmosphere with thermocouples, load cell capacity of 10 kN and an LVDT displacement device. Metallography Plain sample surface Surface of sample subjected to creep at 900 oC, 2 MPa for 230 hrs Fe Fe Composition analysis O2 C C • Increase in carbon content above 1% and observation of oxygen in sample subjected to creep. Effect of Oxidation Femi Richard Fakoya Mario Fafard Chaire de recherche industrielle CRSNG/Alcoa MACE3 et Centre de recherche sur l’aluminium - REGAL, Département de génie civil et génie des eaux, Université Laval Creep Curve at 900 oC and 2 MPa • at 0.08 MPa pre-stress, 900 oC for 24 hours Effect of Thermal Expansion and Phase Change Donald Picard Houshang Alamdari Chaire de recherche industrielle CRSNG/Alcoa MACE3, Centre de recherche sur l’aluminium - REGAL, Département de génie des mines, de la métallurgie et des matériaux, Université Laval Stress (MPa) 2 0.939 0.043 0.887 11.5 0.0032 • Compression strength test at ambient and elevated temperatures • Compressive creep test at different temperature and stress levels • Longer test duration and proposition of suitable model by curve fitting Biannual The study of the deformation behaviour of the cathode collector bar at high L’étude du comportement en déformation de la barre collectrice de la cathode àMeeting - Laval University/Alcoa March 6th and des températures élevées et de faibles contraintes, conditio