It was determined that (1012) type twinning appears to be one of the most predominant modes of deformation at temperatures as high as 1066 C (1950 F). This deformation mode is therefore instrumental in texture development. The prior texture of beryllium appears to affect the development of preferred orientations, especially at low reductions. The mechanical properties of compression rolled sheet approach those of upset sheet. The degree of preferred orientations developed by rolling beryllium at 1000 C is greater than that obtained by rolling at 450 C and annealing between each pass at temperatures of about 800 C. To date, that material which has most closely approached randomly oriented wrought beryllium exhibits a ductility of approximately 1%.
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