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Cryogenic Fracture Toughness Evaluation of an Investment Cast Al-Be Alloy for Structural ApplicationsAluminum-Beryllium metal matrix composite materials are useful due to their desirable performance characteristics for aerospace applications. Desirable characteristics of this material includes light-weight, dimensional stability, stiffness, good vibration damping characteristics, low coefficient of thermal expansion, and workability, This material is 3.5 times stiffer and 22% lighter than conventional aluminum alloys. electro-optical systems, advanced sensor and guidance components for flight and satellite systems, components for light-weight high-performance aircraft engines, and structural components for helicopters. Aluminum-beryllium materials are now available in the form of near net shape investment castings. In this materials properties characterization study, the cryogenic tensile and fracture properties of an investment casting alloy, Beralcast 363, were determined. Tensile testing was performed at 21 C (70 F), -73.3 C (-100 F), -195.5 C (-320 F) and -252.8 C (-423 F), and fracture (K(sub lc) and da/dN) testing was performed at -73.3 C (-100 F), -195.5 C (-320 F) and -252.8 C (-423 F). Their use is attractive for weight critical structural applications such as advanced
Document ID
20060025085
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Gamwell, W. R.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
McGill, P. B.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Structural Mechanics
Meeting Information
Meeting: 2006 National Space and Missile Materials Symposium (NAMMS)
Location: Orlando, Fl
Country: United States
Start Date: June 26, 2006
End Date: June 30, 2006
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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