Orientation of short fibers in powder injection molded aluminum matrix composites

This research demonstrates the application of Multiple Live Feed Molding (MLFM) device for controlling the fiber orientations in powder injection molded aluminum composites. Experiments were performed for a range of powder/fibers composite mixes by using both Multiple Live Feed Molding device and molding technique. Optimum MLFM process parameters were identified to achieve the highest level of fiber orientation in aluminum composite test bars. Fiber orientation was measured in two planes of molded test bars. Average orientation angle “θ” was determined and orientation factor “f” was calculated for composite moldings produced. This investigation has identified the molding composition to achieve the highest level of fiber orientations in a preferred direction, which should result in increased directional mechanical properties