Duggal M.,Yale University |
Deubner D.C.,Brush Wellman Inc |
Curtis A.M.,Yale University |
Cullen M.R.,Stanford University
BMC Public Health | Year: 2010
Background: Up to 12% of beryllium-exposed American workers would test positive on beryllium lymphocyte proliferation test (BeLPT) screening, but the implications of sensitization remain uncertain. Methods. Seventy two current and former employees of a beryllium manufacturer, including 22 with pathologic changes of chronic beryllium disease (CBD), and 50 without, with a confirmed positive test were followed-up for 7.4 +/-3.1 years. Results: Beyond predicted effects of aging, flow rates and lung volumes changed little from baseline, while DLCO dropped 17.4% of predicted on average. Despite this group decline, only 8 subjects (11.1%) demonstrated physiologic or radiologic abnormalities typical of CBD. Other than baseline status, no clinical or laboratory feature distinguished those who clinically manifested CBD at follow-up from those who did not. Conclusions: The clinical outlook remains favorable for beryllium-sensitized individuals over the first 5-12 years. However, declines in DLCO may presage further and more serious clinical manifestations in the future. These conclusions are tempered by the possibility of selection bias and other study limitations. © 2010 Duggal et al; licensee BioMed Central Ltd. Source
Cribb W.R.,Brush Wellman Inc |
Grensing F.C.,14710 West Portage River South Road
Canadian Metallurgical Quarterly | Year: 2011
Copper-15 nickel-8 tin alloy is a relatively modern material, having been discovered in the 1970s. It has complexities with casting, hot working and interdependent solid state phase transformations. A key to the high reliability manufacture of wrought rods, bars, plates and tubes is the casting technology, which limits segregation, promotes microstructural uniformity and enables hot working. The EquaCast continuous casting process has enabled the production of a broadening variety of wrought forms with typical yield strengths ranging from 100 000 to 180 000 lb in-2 (690 to 1241 MPa) depending on size, shape and temper. This paper reviews the characteristics of wrought copper-15 nickel-8 tin products which have registration in AMS specifications (4596 and 4597) and MMPDS-04 (CN-1) for use in aircraft. The design limits, microstructures, fracture characteristics and tribological behaviour will be examined. This alloy system is emerging as a material of choice for aircraft bearings, corrosion resistant oil and gas exploration components, machinery and demanding off-road equipment applications. ToughMet 3 is an alternative or upgrade to conventional moderate and high strength aluminium bronze bearing alloys. © 2011 Canadian Institute of Mining, Metallurgy and Petroleum. Source
Materion Brush Inc. and Brush Wellman Inc | Date: 2012-07-31
Materion Brush Inc. and Brush Wellman Inc | Date: 2010-04-13
High purity beryllium sheet or foil used for x-ray and gamma ray windows and other high energy physics applications.
Materion Brush Inc. and Brush Wellman Inc | Date: 2012-05-22
Metal matrix composites in the form of bars, sheets, panels, plates, and machined blanks composed of a metal matrix combined with a reinforcing material for use in further manufacture.