Assessment of grain refinement by microtexture analysis in thermomechanically processed Al 2519 alloy
Stancy, Steven L.
MetadataShow full item record
The first part of this study involved determining the mechanism by which elevated-temperature deformation occurred for selected tensile specimens from previous research on thermomechanically processed Al2519 alloy. Microtexture information in the form of discrete pole figures indicated that the most highly superplastic material had completely recrystallized and deformed via grain boundary sliding, whereas material that did not display superplastic behavior deformed via slip. The second part of the study was designed to achieve further refinement of the microstructure of Al2519 using the particle stimulated nucleation (PSN) model as a guide. Using the overaging parameters of the thermomechanical process (TMP) that had yielded the greatest elongation in previous work, additional material was processed but with varying final total processing strain. The resulting material was analyzed using backscatter electron (BSE) microscopy methods to evaluate the effect of total processing strain on the average grain size. The smallest true volume grain size was associated with the material with the highest total processing strain. jg p3.
RightsThis 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.
Showing items related by title, author, creator and subject.
Kalvig, Joanna D. (Monterey, California. Naval Postgraduate School, 2011-03);The purpose of this project is to assess the benefit of utilizing portals to manage and reduce excess materials in the Afloat Logistics System (ALS). Through this process, this report shall identify: 1) What IT system(s) ...
A comparison of alternative methods of obtaining Defense Logistics Agency (DLA) cognizance spare parts for Contractor Furnished Equipment (CFE) during initial outfitting of U.S. Navy ships Pinkerton, Kim Gregory (Monterey, California. Naval Postgraduate School, 1991);This thesis is a limited determination of the most cost effective method of acquiring Defense Logistics Agency (DLA) cognizance initial outfitting material for new construction ships. The study is restricted to Contractor ...
Modeling of thermal and mechanical effects during friction stir processing of nickel-aluminum bronze Jamison, Jay Dee (Monterey, California. Naval Postgraduate School, 2004);Friction Stir Processing (FSP), although relatively simple in concept, results in an extremely complex thermomechanical treatment to the material being processed. Previous studies of FSP have shown that the process results ...