Effects of laboratory rolling conditions on continuously cast AA5083
Thompson, Matthew F.
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Quick Plastic Forming (QPF) is a recent adaptation of Superplastic Forming (SPF) that allows economical fabrication of complex components using superplastic material. QPF requires refined, equiaxed grains and high-angle grain boundaries in the microstructure to enhance sheet deformation by GBS at the high strain rates involved. This study evaluates the effects of laboratory rolling conditions on continuously cast AA5083 in the hot-band condition in anticipation of QPF. Orientation imaging microscopy, scanning electron microscopy and X-ray analysis were used to analyze roles of the geometric dynamic recrystallization and particle stimulated nucleation of recrystallization in the microstructure evolution during rolling. A refined microstructure was developed during the rolling procedures but mechanical property data indicated low to moderate ductility and failure by excessive cavity formation. Factors influencing the development of microstructure and mechanical properties during laboratory rolling were investigated.
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