Theron, MarithaKnutsen, RDIvanchev, LHBurger, HP2011-12-122011-12-122012-02Theron, M, Knutsen, RD, Ivanchev, LH and Burger, HP. 2012. Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum. Journal of Materials Processing Technology, Vol 212(2), pp 465-4700924-0136http://www.sciencedirect.com/science/article/pii/S0924013611002925http://hdl.handle.net/10204/5382Copyright: 2012 Elsevier. This is an ABSTRACT ONLYSemi-solid metal rheo-cast F357 aluminum plates were joined by autogenous Nd:YAG laser welding and were welded in either the as-cast (F) condition, T4 temper or T6 temper condition. The weldability of this age-hardenable Al–7%Si–0.6%Mg casting alloy was characterized by assessment of the microstructure in the fusion and heat-affected zones and by measurement of the weld-plate tensile and hardness properties. The low heat input provided by the laser welding process resulted in high cooling rates (450–600 K/s) within the fusion and adjacent heat affected zones. This thermal cycle closely resembles quenching practice for standard solution treatments (500–700 K/s) and as a result the T4 condition was maintained during the welding process. Tensile properties equivalent to the parent metal T6 condition were obtained after exposing welded T4 plates to conventional artificial ageing treatment.enSemi-solid metalF357 aluminumLaser weldingHeat treatmentStrength propertiesMaterials processing technologyArticleTheron, M., Knutsen, R., Ivanchev, L., & Burger, H. (2012). Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum. http://hdl.handle.net/10204/5382Theron, Maritha, RD Knutsen, LH Ivanchev, and HP Burger "Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum." (2012) http://hdl.handle.net/10204/5382Theron M, Knutsen R, Ivanchev L, Burger H. Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum. 2012; http://hdl.handle.net/10204/5382.TY - Article AU - Theron, Maritha AU - Knutsen, RD AU - Ivanchev, LH AU - Burger, HP AB - Semi-solid metal rheo-cast F357 aluminum plates were joined by autogenous Nd:YAG laser welding and were welded in either the as-cast (F) condition, T4 temper or T6 temper condition. The weldability of this age-hardenable Al–7%Si–0.6%Mg casting alloy was characterized by assessment of the microstructure in the fusion and heat-affected zones and by measurement of the weld-plate tensile and hardness properties. The low heat input provided by the laser welding process resulted in high cooling rates (450–600 K/s) within the fusion and adjacent heat affected zones. This thermal cycle closely resembles quenching practice for standard solution treatments (500–700 K/s) and as a result the T4 condition was maintained during the welding process. Tensile properties equivalent to the parent metal T6 condition were obtained after exposing welded T4 plates to conventional artificial ageing treatment. DA - 2012-02 DB - ResearchSpace DP - CSIR KW - Semi-solid metal KW - F357 aluminum KW - Laser welding KW - Heat treatment KW - Strength properties KW - Materials processing technology LK - https://researchspace.csir.co.za PY - 2012 SM - 0924-0136 T1 - Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum TI - Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum UR - http://hdl.handle.net/10204/5382 ER -