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Plastic Deformation on High Purity Magnesium Prepared by Deposition Technique

Poor deformability is one of the disadvantages in magnesium. However, the present authors have shown that high purity magnesium can be cold-rolled at room temperature with 80 % in reduction without cracking. Recrystallization occurs in the cold-rolled specimen. The specimens were prepared by vapor deposition technique. In the deposition technique, 3N-Mg is vaporized in vacuum and deposited on a graphite plate to be obtained high purity magnesium film. Electron backscattered patterns showed that the film had a texture of basal plane inclined with about 35 degree from the normal of the film surface. Many non-basal dislocations were observed in the cold-rolled specimen. Magnesium would intrinsically possess good deformability, but impurities deterioratively affect the property.