Article history: Received 28.3.2013 Received in revised form 26.4.2013 Accepted 29.4.2013 Aluminum matrix composites containing 55% SiC particle reinforcing phase/SiC reinforcement phase particle and Kovar alloy 4J29 were chosen as the base metals. After nickel plating on the surface of SiCp/Al, two kinds of materials were soldered together by using Zn-Cd-Ag-Cu as the filler metal and ZnCl2 as ...

The effect of reheating to the semisolid state (soaking treatment) on the microstructure evolution of the A356 aluminum alloy prepared by ultrasonic melt treatment was studied in this paper. The results showed that in general the longer the soaking process the larger and the more round the grains obtained. Higher roundness occurs at shorter soaking times in the fine-grained ascast samples, and ...

Semi-solid forming processes are now used for producing near net shape parts especially in the automotive and aircraft industries. Non Newtonian rheology of semisolid alloys and its dependence on the various parameters such as reheating cycle, method used to produce non-dendritic structure, thermo-shear history etc. have made the simulation of the flow behavior of semisolid material a difficult...

The present study examines the effect of trace additions copper (up to 1 wt.%) and zinc (0.5 as alloying elements on microstructure, hardness, wear behaviour T6 treated A356 (Al-7Si) alloy. Wear tests were conducted using a pin-on-disc tribometer under constant sliding speed 200 RPM, varying applied load (20–40 N), distance (0–3000 m) determine rate coefficient friction. results indicated minim...

The present study was performed on A356 and B319 alloys in mechanically stirred or degassed condition. Melts were Sr-modified grain-refined. Hydrogen content varied from less than 0.1 ml/100 g Al to ∼0.4 Al; Fe increased 0.8% alloy. Lanthanum cerium added as 99.5% pure metals. Two main techniques used investigate porosity formation: fracture surface of tensile fatigue test bars, reduced pressur...

High performance, cast aluminum automotive wheels are increasingly being incrementally formed via flow forming/metal spinning at elevated temperatures to improve material properties. With a wide array of processing parameters which can affect both the shape attained and resulting material properties, this type of processing is notoriously difficult to commission. A simplified, light-duty versio...