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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. / US Navy (USN) author.

Yeung Yeung = 電化學堆積法產生的金屬聚集物之內部結構 / 楊陽. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / Yeung Yeung = Dian hua xue dui ji fa chan sheng de jin shu ju ji wu zhi nei bu jie gou / Yang Yang. / Acknowledgement --- p.i / Abstract --- p.ii / 摘要 --- p.iv / Chapter Chapter 1 --- Introduction --- p.1 / Chapter Chapter 2 --- Mechanisms of Metallic Deposition and Dendrite Formation of Electro-chemical Deposition (ECD) / Chapter 2.1 --- Introduction --- p.6 / Chapter 2.2 --- Electrochemical Growth on the Cathode --- p.6 / Chapter 2.3 --- Dendritic Formation --- p.13 / Chapter 2.4 --- Conclusion --- p.14 / Chapter Chapter 3 --- "Studies of ""Ramified"" Structures Obtained by Electro-chemical Deposition (ECD)" / Chapter 3.1 --- Introduction --- p.16 / Chapter 3.2 --- Experimental Setup --- p.17 / Chapter 3.3 --- Results and Discussions --- p.21 / Chapter 3.4 --- Dendrite Obtained by Using Very Thin Cells --- p.38 / Chapter 3.5 --- Dendritic Aggregates Obtained by Using Other Cations --- p.44 / Chapter 3.6 --- Conclusion --- p.53 / Chapter Chapter 4 --- Electro-chemical Deposition of metallic Crystals Using Low Potential Difference / Chapter 4.1 --- Introduction --- p.57 / Chapter 4.2 --- Experimental Setup --- p.58 / Chapter 4.3 --- Results and Discussions --- p.60 / Chapter 4.4 --- Conclusion --- p.68 / Chapter Chapter 5 --- Electro-chemical Deposition in a Vertical Cell / Chapter 5.1 --- Introduction --- p.70 / Chapter 5.2 --- Background Theory --- p.71 / Chapter 5.3 --- Experimental Setup --- p.74 / Chapter 5.4 --- Results and Discussions --- p.76 / Chapter 5.5 --- Conclusion --- p.84 / Chapter Chapter 6 --- Interesting Metallic Aggregates Obtained by Electro-Chemical Deposition / Chapter 6.1 --- Introduction --- p.87 / Chapter 6.2 --- Aggregates Obtained from Thin Gap ECD --- p.87 / Chapter 6.3 --- Dendrites Formed from ECD in Bulk Solutions --- p.92 / Chapter 6.4 --- Concluding Remarks --- p.93 / Chapter Chapter 7 --- Future Outlook --- p.95