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12 December 2003 Cryogenic properties of aluminum-beryllium and beryllium materials
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Abstract
Ultimate tensile strength, yield strength, and elongation were obtained for the aluminum-beryllium alloy, AlBeMet162 (38%Al-62%Be), at cryogenic [(-195.5°C (-320°F) and (-252.8°C) (-423°F)] temperatures, and for an optical grade beryllium, O-30H (99%Be), at -252.8°C. AlBeMet162 material was purchased to the requirements of SAE-AMS7912, "Aluminum-Beryllium Alloy, Extrusions." O-30H material was purchased to the requirements of Brush Wellman Inc. specification O-30H Optical Grade Beryllium. The ultimate tensile and yield strengths for extruded AlBeMet162 material increased with decreasing temperature, and the percent elongation decreased with decreasing temperature. Design properties for the ultimate tensile strength, yield strength, and percent elongation for extruded AlBeMet162 were generated. It was not possible to distinguish a difference in the room and cryogenic ultimate strength for the hot isostatically pressed (HIP'ed) O-30H material. The O30H elongation decreased with decreasing temperature.
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Wayne R Gamwell and Preston B. McGill "Cryogenic properties of aluminum-beryllium and beryllium materials", Proc. SPIE 5179, Optical Materials and Structures Technologies, (12 December 2003); https://doi.org/10.1117/12.504397
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