Effects of Alloying Elements Additions on Ambient Temperature Performance of Al–Si–Cu–Mg Base Alloys
作者： H. W. Doty , A. M. Samuel , F. H. Samuel , E. A. Elsharkawi , G. H. Garza Elizondo
DOI: 10.1007/S40962-020-00568-2
关键词: Casting 、 Alloy 、 Microstructure 、 Copper 、 Materials science 、 Ultimate tensile strength 、 Metallurgy 、 Deformation (engineering) 、 Ductility 、 Phase (matter)
摘要: The present study was carried out to investigate the effects of Ni, Mn, Zr, and Sc additions, individually or in combination with other additives, on microstructure tensile properties 354 casting alloy (Al—9wt%Si—1.8wt%Cu—0.5wt%Mg) at room temperature. Tensile tests were as-cast, solution heat-treated, aged conditions using different aging temperatures times. Six alloys prepared alloy, comprising a) base (G1) five (G6 G10) containing Sc, added combination, one experimental (G7) no copper. Among transition element additions through G10), highest yield strength values are obtained G7 (2wt% Ni 0.25wt% Zr but Cu) as-cast heat-treated conditions; G8 G10 also display a significant increase ductility conditions. Solution heat treatment significantly improves quality these even if they contain higher Fe Mg levels compared alloy. Holding samples T6-treated G1 resulted marked density precipitated phase form fine spherical particles. Increasing holding time prior deformation 100 h change morphology Al2Cu precipitates into thin platelets distributed two perpendicular directions.
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