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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5382

Title: Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum
Authors: Theron, M
Knutsen, RD
Ivanchev, LH
Burger, HP
Keywords: Semi-solid metal
F357 aluminum
Laser welding
Heat treatment
Strength properties
Materials processing technology
Issue Date: Feb-2012
Publisher: Elsevier
Citation: Theron, 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 465-470
Series/Report no.: Workflow request;7630
Abstract: 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.
Description: Copyright: 2012 Elsevier. This is an ABSTRACT ONLY
URI: http://www.sciencedirect.com/science/article/pii/S0924013611002925
ISSN: 0924-0136
Appears in Collections:Laser materials processing
General science, engineering & technology

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