Nearly twenty years ago, Structure and Interpretation of Computer Programs (SICP) changed the intellectual landscape of introductory computing courses. Unfortunately, three problems—its lack of an explicit program design methodology, its reliance on domain knowledge, and the whimsies of Scheme— have made it integrate poorly with the rest of the curriculum and fail to maintain its position in se...

Metal matrix composites have been increasingly used as materials for components in automotive and aerospace industries because of their improved properties compared with non-reinforced alloys. During machining the selection of appropriate machining parameters to produce job for desired surface roughness is of great concern considering the economy of manufacturing process. In this study, a surfa...

Abstract In this study, filtration of aluminum alloy (Al) with different weight fractions SiC particles (SiCp) was investigated. Therefore, three filter materials 20 pores per inch (ppi) ceramic foam filters (CFF) were tested. A special three-chamber furan mold used for the casting trials to provide uniform filling and flow conditions process. Samples from sections gating system, as well filter...

SiC-reinforced aluminum matrix composites (SiCp/Al composites) are typically difficult-to-machine material, and the irregular SiC diffused in SiCp/Al make surface quality worse. In this paper, a single-point cutting simulation with variable plane depth were conducted for composite higher volume fraction (65 Vol%) alloy. The morphology characteristics of composites, which mainly include breaking...

Aluminum (Al)-based silicon carbide (SiC) material composites are considered as difficult-to-machine materials because of the presence hard reinforced SiC particles, which results in a greater cutting force and poor surface integrity during machining process. This paper established micro-anisotropic mechanical models SiCp/Al with 10vol% studied difference mechanism between ultrasonic elliptical...

Aluminum matrix composites reinforced with SiC particles (SiCp) were deposited on ZE41 magnesium substrates by laser cladding in order to improve their tribological performance. Silicon and titanium added the avoid Al-SiC reactivity. The addition of these elements Al4C3 formation during fabrication was successfully explored previous research, but effect wear behavior corrosion resistance coatin...

Revealing the interactions of sound waves with both SiC particles and internal defects is crucial for facilitating detectability defect features in SiCp/Al by using ultrasonic testing (UT). In present work, we demonstrate feasibility UT flat-bottom holes diameters ranging from 0.2 mm to 2 composites through combination finite element (FE) simulations experiments. Specially, a 2D FE model consis...