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Al-Si-Fe-Cu-Mg alloy was prepared by spray deposition and was further processed by hot extrusion as well as T6heat-treatment.The results indicate that the microstructure of the deposited alloy is composed of primary Si particles with average size of less than 5μm,α-Al,Al_2CuMg,β-Al_5FeSi andδ-Al_4FeSi_2(rectangular shape),and no eutectic silicon is found due to the special solidification behavior.The age hardening curves reveal two peaks.The uniform ultimate tensile strength(UTS)and the elongation of the peak-aged Al-Si-Fe-Cu-Mg alloy are 468.3 MPa,0.61% at 298 Kand 267.4MPa,6.42% at 573 K,respectively.The fracture surfaces display brittle fracture morphology at 298 K,whereas it varies to mixture of brittle and ductile failure with increasing the temperature.
Al-Si-Fe-Cu-Mg alloy was prepared by spray deposition and was further processed by hot extrusion as well as T6 heat-treatment. The results indicate that the microstructure of the deposited alloy is composed of primary Si particles with an average size of less than 5 μm, α-Al, Al_2CuMg, β-Al_5FeSi and δ-Al_4FeSi_2 (rectangular shape), and no eutectic silicon was found due to the special solidification behavior. The age hardening curves reveal two peaks.The uniform ultimate tensile strength (UTS) and the elongation of the peak-aged Al-Si-Fe-Cu-Mg alloy were 468.3 MPa, 0.61% at 298 Kand 267.4 MPa, 6.42% at 573 K, respectively. The fracture surfaces were brittle fracture morphology at 298 K, varies to mixture of brittle and ductile failure with increasing the temperature.