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Proceedings Paper

38% Aluminum - 62% Beryllium shaped blank technology
Author(s): James T. Knapp
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Paper Abstract

Near-Net-Shape (NNS) technology for advanced engineered materials provides a number of supply chain benefits. These benefits include less input material, less machining hours and overall greater through put in comparison to conventional rectangular and round machining stock. Al-62%Be alloy has a unique combination of properties attractive for optical structures. It has a density of 0.076-lb/in3, 28-ksi minimum yield strength and 28-Msi elastic modulus. There have been significant developments with AlBe Hot Isostatic Press (HIP) consolidation technology in recent years. One key is using spherical AlBe metal powder which packs to a high density. The high packing density allows more complex can design and dimensional control to produce monolithic parts with isotropic properties. Other key success factors are HIP can design and the process to implement the near-net-shape strategy. This paper will describe an example of a process using shaped HIP cans to produce blanks approaching near-net-shape design through an iterative process. The strategy is to produce a seamless product to the next step in the supply chain as the iterations improve material utilization efficiency. The economic impact and planned future work will also be described.

Paper Details

Date Published: 17 September 2007
PDF: 8 pages
Proc. SPIE 6666, Optical Materials and Structures Technologies III, 66660W (17 September 2007); doi: 10.1117/12.739128
Show Author Affiliations
James T. Knapp, Brush Wellman, Inc. (United States)

Published in SPIE Proceedings Vol. 6666:
Optical Materials and Structures Technologies III
William A. Goodman; Joseph L. Robichaud, Editor(s)

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