This project proposes to repair fatigue damage in j-52 compressor discs using a nickel-titanium "shape memory" alloy expansion bushing. bushing inserts of conventional alloy materials can result in significant improvements in fatigue strength at ambient temperatures when the material surrounding the… More

It has been demonstrated that coatings deposited by a recently-developed process called the hypersonic flame spray process are harder, denser, and less porous than coatings applied by plasma spray or conventional flame spraytechniques. as such, this process has the potential to apply coatings onto… More

Previous efforts to spray-form metal structures using conventional plasma spray have usually resulted in shapes which had very limited ductility because of excessive porosity and oxidation. it has recently been shown that the spray of metals in a near-vacuum environment virtually eliminates these… More