25] Seidel, R., Small-dimensional linear programming and convex hulls made easy. range searching and new zone theorems. A linear time algorithm for determining the separation of convex polyhedra. Two dimensional computation of the three dimensional reachable region for a welding head. 29 list some open problems related to this paper, and then list a few others in cast design that deserve attent...

Development of a Nanoscale Precipitation-Strengthened Creep-Resistant Aluminum Alloy Containing Trialuminide Precipitates Keith Edward Knipling This research is toward developing a castable andheat-treatable precipitation-strengthened aluminum alloy exhibiting coarseningand creep resistance at temperatures exceeding 400°C. Criteria for selecting alloying elements capable of producing such an al...

Primary boron containing dispersoids grown from the melt in a Ti-45.5at.%Al-1.6at.%Fel.lat.%V-0.7at.%B alloy, and then annealed at 1473K, have been investigated using optical microscopy, conventional transmission electron microscopy (CTEM) and analytical electron microscopy. The dispersoid morphology is in the form of high aspect ratio plates, hundreds of microns across and cross-sectional widt...

Reducing vehicle weight improves the fuel efficiency, driving dynamics, and performance of vehicles ranging from traditional internal combustion engine (ICE) powered to battery electric vehicles (BEVs), fuel cell vehicles (FCVs), and the full range of hybrids [1]. However, along with tremendous opportunities, introduction of novel lightweight materials and architectures presents numerous engine...

The forrning process is very important in the production of ceramics because the defects introduced during this manufacturing step will remain in the product even after the sintering process.In this work the rheological properties of aqueous suspensions of Si3N4-Si-A1203-Zr0 2 powders are studied in order to define the appropriate conditions for preparing good slips for the production of high t...

High purity aluminum has always been a good heatsink material for removing heat from electronic components. However, the manufacturing of specialty shaped, non-extrusion based heatsinks, causes many material-based problems. High purity aluminum is very difficult to die cast and impurities must normally be added to aid in the die casting process. These small amounts of impurities cause the therm...