Processing-microstructure-property relationships for cold spray powder deposition of Al-Cu alloys

Download
Author
Leazer, Jeremy D.
Date
2015-06Advisor
Menon, Sarath K.
Brewer, Luke N.
Metadata
Show full item recordAbstract
This thesis presents research on the cold gas-dynamic spray process applied to the deposition of aluminum-copper alloy coatings. Cold spray deposition is a process utilized to create corrosion protection coatings and to perform additive repair for aluminum structures. This thesis utilized a series of Al-Cu binary alloy powders, from 2–5 weight percent copper and characterized their chemistry and microstructure. The powders were deposited using the cold spray approach to study the systematic increase of the alloying agent on the deposition process and coating characteristics. Deposition efficiency, critical velocity, coating thickness, hardness, porosity, and microstructure were all characterized as functions of carrier gas pressure, carrier gas temperature and feedstock powder copper composition. This thesis has demonstrated that all of the aluminum copper powders utilized can be successfully deposited via the low-pressure cold spray process with helium as the carrier gas. The copper content of the powders has a direct effect on the volume fraction of Al2Cu intermetallics, and on the coating hardness, while having no measurable effect on critical velocity for deposition or the coating thickness per pass.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Related items
Showing items related by title, author, creator and subject.
-
The cold gas-dynamic spray and characterization of microcrystalline and nanocrystalline copper alloys
Marple, William J. (Monterey, California. Naval Postgraduate School, 2012-12);This thesis presents research on the cold gas-dynamic spray processa relatively new technology that may be utilized to create metal coatings in the solid state. While the thermodynamics and fluid mechanics of the cold ... -
The cold gas-dynamic spray and characterization of microcrystalline austenitic stainless steel
Schiel, Jonathan F. (Monterey, California: Naval Postgraduate School, 2014-09);This thesis presents research on the cold gas-dynamic spray process applied to the deposition of stainless steel coatings. Cold spray deposition is a relatively new process utilized to create corrosion protection coatings ... -
The influence of alloy composition and thermo-mechanical processing procedure on microstructure and mechanical properties of high-magnesium aluminum-magnesium alloys
Johnson, Ralph Brian (Monterey, California. Naval Postgraduate School, 1980-06);The purpose of this research was the development of a thermo mechanical procedure to process Aluminum- Magnesium alloys and testing effects of alloying additions on these alloys. Magnesium contents of eight and ten weight ...