... with these applications the erosion resistance of the underlying gun steel is the service-life limiting factor. The U.S. Army Research Laboratory (ARL) is currently undertaking an effort to determine the feasibility of ceramic gun barrels. Ceramics are attractive for liner materials because of their high-temperature...

...Chiaki Miyasaka; Bernhard R. Tittmann Alumina ceramic is being used extensively for external pressure vessels in naval applications. The material is also used in valves and other components, where reliability, immunity from corrosion, and high temperatures are required. This report presents...

...John H. Underwood; Anthony P. Parker Stress and fracture analysis of ceramic-lined cannon pressure vessels is described, for a Si 3 N 4 or SiC liner and A723 steel or carbon-epoxy jacket and with an initial residual interface pressure between liner and jacket and pressure applied to the bore. Room...

... fracture toughness testing. It is uniquely suitable for testing a wide variety of materials used extensively in pressure vessel and piping structural components and weldments, including others such as ceramics, their composites, and concrete. The SNTT system operates by applying pure torsion to uniform...

...Walied A. Moussa, Mem. ASME, Assistant Professor, The existence of arbitrarily oriented multiple cracks is a common problem in brittle materials. Some of these materials, such as ceramics, are used in mechanical and aerospace structures that suffer from aging. Because of that, such structures have...

.... The defective specimens showed significantly different patterns of surface acoustic wave velocities. Thus, this study presents useful guidelines in discriminating between sound and defective ceramic/metal joints by scanning acoustic microscopy. Contributed by the Pressure Vessels and Piping Division...

... materials such as ceramics; • reduced water consumption. High-pressure (∼400-MPa) waterjets have been used to cut materials such as paper products, plastics, cloth, leather, wood, fiberglass, and some organic composites. Waterjets at current reliable working pressures (up to 414 MPa) cannot...

... of noncontact and/or air-coupled transducers. For example, it would be valuable to know the elastic properties of green ceramic to measure its porosity and ideally its density before firing in a furnace to sinter a component. The challenge is the transfer of acoustic energy across the solid/air interface...