By Awadh B. Pandey, Kevin L. Kendig, Thomas J. Watson
This e-book will comprise papers on fresh examine conducted within the box of metal-matrix composites (MMCs). Processing, microstructure, and mechanical homes of MMCs and unreinforced matrix alloys might be coated with a spotlight on aluminum, titanium, nickel, and copper MMCs. these serious about the study of MMCs and unreinforced alloys, quite in aerospace, area, and car fabrics examine, will locate this quantity indispensible.
From Materials technology & know-how 2003 to be held in Chicago, Illinois, November 9-12, 2003.Content:
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Additional resources for Affordable Metal-Matrix Composites for High Performance Applications II
As with other components, near net-shape processing techniques are desired to alleviate the reliance on expensive, and long lead-time, forging and machining processes. "Warm" temperature applications for aluminum MMCs are considered high temperature applications for aluminum, but moderate temperature environments in rocket engines. Turbine rotating components, stationary elements, and housings in expander cycle engines run at temperatures up to 260 °C (500 °F). "Warm" propellant ducting and backup structures also operate in this thermal environment, but at lower stress levels.
The wear ring fractured after approximately 9 minutes duration. Figure 9 shows the remnants of the wear ring attached to the road wheel. The primary fracture path appears to be circumferential. Failure did not initiate at the rivet holes, but in the area of the wear surface in direct contact with the center guides. Figure 9. Full Scale Wear Ring Test Setup Figure 10. Fractured Wear Ring After 10 min. at 4,000 lb. Applied Load. We have examined one of the fractured pieces shown in the photograph of Figure 9 by scanning electron microscopy (SEM).
The rocket propulsion, aeropropulsion and aerostructures industries do not often compete directly, and so a high degree of cooperation can be expected. Concluding Remarks MMC's have filled important needs for space systems in the past, and have a large range of opportunities for dramatic improvements in advanced space systems. The properties offered by MMC's include high specific strength and stiffness, excellent thermal and electrical properties, tailorable coefficient of thermal expansion, compatibility with cryogenic fluids and affordable processing via an established manufacturing infrastructure.