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Grain size control in AA5083: thermomechanical processing and particle stimulated nucelation

Approved for public release; distribution is unlimited / "Superplastic forming is an emerging industrial technology that allows the production of complex shapes in metallic materials including aluminum. A critical characteristic of materials that are capable of sustaining superplastic forming is a fine grain size. In this study a commercial aluminum-magnesium-manganese alloy received in the as-cast condition was subjected to various thermomechanical processes intended to refine the grain size. Particle stimulated nucleation (PSN) theory was employed to develop the thermomechanical processes. These processes all involved initial homogenization and hot working. Subsequent annealing treatments were intended to control the size and size distribution of second phase particles, such as Al6Mn. Strain energy was introduced through cold rolling followed by recrystallization anneals. Samples were analyzed using orientation-imaging microscopy to examine the effect of processing variables on the recrystallized grain size." p. i. / Ensign, United States Navy
Date06 1900
CreatorsDeffenbaugh, Kristen Lynn
ContributorsMcNelley, Terry R., Naval Postgraduate School (U.S.)., Mechanical and Astronautical Engineering
PublisherMonterey, California. Naval Postgraduate School
Source SetsNaval Postgraduate School
Detected LanguageEnglish
Formatxiv, 49 p. : ill. ;, application/pdf
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.

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