Microstructure Exploration of the Aluminum-Tungsten Carbide Composite with different Manufacturing circumstances
In the last decade, as demand for high quality materials are increased, the development of lightweight aluminum (Al) also increased especially in aerospace and automotive industries. It has been well known that Al based metal matrix composites (MMCs) offers a very low thermal expansion coefficient, high specific strengths, wear and heat resistance as compared to conventional Al alloys. In order to combine all these properties, MMCs have become a very attractive method for various industrial applications. The interest in Tungsten Carbide (WC) as reinforcements for aluminum (Al) has been growing considerably. Efforts have been largely focused on investigating their contribution to the enhancement of the mechanical performance of the composites. The uniform dispersion of Tungsten Carbide in the Al matrix has been identified as being critical to the pursuit of enhanced properties. In this present research paper emphasis, the effect of Tungsten Carbide content on the Physical properties of the composites like SEM, XRD was investigated. The improvement of physical properties for composites of Al/WC has been compared with pure aluminum.
MICROSTRUCTURE AND TRIBOLOGICAL BEHAVIOUR OF ALUMINIUM REINFORCED WITH TUNGSTEN CARBIDE PARTICULATE AND FLYASH METAL MATRIX COMPOSITES
Metal Matrix Composites are formed by combination of two or more materials (at least one of the materials is metal) having dissimilar characteristics. In this present investigation, Aluminium (Al 6061) as base matrix metal and Tungsten Carbide (WC) particulate, Fly ash as reinforcements. Fabrication of MMCs was done by stir-casting process. The Tungsten Carbide particulate was added in proportions of 1%, 2%, and 3% and Fly ash was added in proportions of 2%, 4%, and 6% on mass fraction basis to the molten metal. The different combination sets of composites were prepared. The tribological property of Al metal matrix composites, reinforced with WC and fly ash particles is presented. Sliding tests were performed on a pin-on-disk apparatus under different contact loads. It was found that the reinforced WC and fly ash particles could effectively reduce the wear, especially under higher normal loading conditions. In order to further understand the wear mechanisms, the worn surfaces were examined under the scanning electron microscope.
RIP - General Purpose Interactive Display at HHIRF
RIP is a general purpose interactive code for display and analysis of data acquired with the Holifield Heavy Ion Research Facility (HHIRF) accelerators at Oak Ridge National Laboratory. The HHIRF data acquisition system includes a version of RIP for on-line display of one-and two-dimensional histograms on color graphic terminals and hard copy on color printer/plotters. General features of the program and interactive techniques will be described.