Investigation of the Weldability of Al_2O_3 Reinforced Alumix 231 Based Composite Materials Produced by Powder Metallurgy Route

摘要

In the present study, weldability of Alumix 231 based composite material reinforced with Al_2O_3 produced by powder metallurgy route, has been investigated. Various amounts of Al_2O_3 powders (0-5-10-15% wt) were added to the pre-alloyed Alumix 231 (Al-2.5%Cu - 0.5% Mg -14% Si) powders and then mixed in a three dimensional mixer for 45 min. Powders were compacted and sintered in argon atmosphere at 640 °C for 4 h. Produced parts were welded by Tungsten Inert Gas (TIG) welding at 25 V, 135 A and 14 It/min parameters in Ar atmosphere. Macro and micro examination together with some mechanical properties of the welded area have been investigated.