Physical Metallurgy of Beryllium

H. D. Hanes · Stanley W. Porembka · J. B. Melehan · P. J. Gripshover

1966年1月 · Defense Metals Information Center, Battelle Memorial Institute

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This report summarizes the recent work done to more fully understand the physical metallurgy of beryllium. A review of work on purification of beryllium, which has yielded high-quality single crystals, was made. The basic deformation properties of beryllium have thus been more clearly defined. The effects of certain alloying elements and impurities are also discussed. Deformation modes in polycrystalline beryllium are discussed based on the results of studies of single crystals. The texture developed in polycrystalline beryllium by fabrication and resulting effects on mechanical properties are dealt with, as well as fracture modes in single-crystal and polycrystalline beryllium. Bend-plane splitting is the method suggested for initiation of fracture in beryllium. Some effects of the distribution of impurities as a result of thermal treatment on the mechanical properties are cited. Since grain size is an important factor in determining properties, recrystallization and grain-growth phenomena are covered. The physical-metallurgical phenomena which contribute to the properties and fabricability of commercial products are discussed. (Author).