Effects of strain path on the microstructure of aluminum alloys during Equal Channel Angular Pressing (ECAP)
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Authors
Houston, Katrina M.
Subjects
Advisors
McNelley, Terry
Date of Issue
2007-12
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
Aluminum alloys AA1050 and AA6061 were processed by ECAP following either monotonic or redundant routes. The materials were characterized by optical microscopy and orientation imaging microscopy. Grain shape changes were analyzed in different billet planes to assess microstructure refinement mechanisms and were consistent with a proposed model. The results demonstrate that microstructure development is not independent of processing route. In the case of AA6061, annealing characteristics were examined to determine if the material has the requisite properties typically exhibited by a superplastic material. Recommendations are made for future research. This work was funded in part by the Air Force Office of Scientific Research (AFOSR) under contract number F1ATA06058G001.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funding
Format
xii, 57 p. : col. ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.