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In metallurgy, peening is the process of working a metal's surface to improve its material properties, usually by mechanical means, such as hammer blows, by blasting with shot (shot peening), focusing light (laser peening), or in recent years, with water column impacts (water jet peening) and cavitation jets (cavitation peening). [1]
Fort Knox is a United States Army installation in Kentucky, south of Louisville and north of Elizabethtown. It is adjacent to the United States Bullion Depository (also known as Fort Knox), which is used to house a large portion of the United States' official gold reserves , and with which it is often conflated.
The radiation source within the Godiva device was a fissile metallic mass (usually highly enriched 235 U), [3] about 11.8 inches (30 cm) in diameter. This was located at the top of a 6.5-foot (2 m) high metal tower.
Fort Knox, now Fort Knox State Park or Fort Knox State Historic Site, [1] is located on the western bank of the Penobscot River in the town of Prospect, Maine, ...
Because peening typically produces larger surface features than sand-blasting, the resulting effect is more pronounced. Shot peening and abrasive blasting can apply materials on metal surfaces. When the shot or grit particles are blasted through a powder or liquid containing the desired surface coating, the impact plates or coats the workpiece ...
Laser peening (LP), or laser shock peening (LSP), is a surface engineering process used to impart beneficial residual stresses in materials. The deep, high-magnitude compressive residual stresses induced by laser peening increase the resistance of materials to surface-related failures, such as fatigue, fretting fatigue, and stress corrosion cracking.
In June 1935, the U.S. Treasury announced its intention to quickly build a gold depository on the grounds of Fort Knox, Kentucky. Its purpose was to store gold then kept in the New York City Assay Office and the Philadelphia Mint. This intent was in keeping with a policy previously announced to move gold reserves away from coastal cities to ...
A kinebar is a gold bar that has a diffractive optically variable image device (similar to a security hologram) embossed into the surface of the gold. The device used is a "Kinegram" made by OVD Kinegram AG (Switzerland). [1]