Ahlatci H. | Candan E. | Çimenoglu H.
Article | 2004 | Wear257 ( 05.Jun ) , pp.625 - 632
In this study, the effect of Si addition up to 8% Si on the abrasive wear and mechanical properties of Al-Si/60 vol.% SiC composites produced by pressure infiltration technique has been investigated. Optimum properties in terms of improved strength and abrasion resistance without significant loss in toughness were obtained when the matrix alloy contained 1% Si. At Si contents higher than 1%, dramatic decrease of toughness was accompanied a reduction in strength and abrasion resistance. © 2004 Elsevier B.V. All rights reserved.
Uzun O. | Yilmaz F. | Emeksiz C. | Ergen S. | Kolemen U.
Article | 2018 | Archives of Metallurgy and Materials63 ( 1 ) , pp.467 - 472
In this study, we have focused on the role of silicon morphology on the hardness of eutectic Al – 12 wt.% Si – 0.5 wt.% Sb alloy solidified at different cooling rates. The alloys were produced by using induction melting, arc-remelting and melt-spinning techniques. The cooling rates of the alloys were determined as 0.5, 60 and ~105°C.s–1 for induction-melted, arc-remelted and melt-spun alloy. The experimental results show that as the cooling rate increased the coarse silicon phase was substantially refined and its morphology altered from sharp need-like to round shape. Two exothermic peaks, attributed to precipitation and coarsening . . .of silicon from supersaturated ?-Al, were observed in the DSC curve of MS alloy. Vicker’s hardness of melt-spun alloy was found two times higher than those of IMed and ARed alloys. The lowest hardness of induction-melted alloy was ascribed to the lamellar morphology of silicon, yielding decohesive rupture. This result was confirmed by finite element analyzing. © 2018 Polish Academy of Sciences. All Rights Reserved Daha fazlası Daha az