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Mechanical properties of particulate composites based on a body-centered-cubic Mg-Li alloy containing boronThe effect of substituting the Mg metal in Mg-B composites by a Mg-14 wt pct Li solid solution on the ductility of the resulting composite was investigated using elastic modulus measurements on the P/M composite material prepared with a dispersion of B particles (in a vol pct range of 0-30) in a matrix of Mg-14 wt pct Li-1.5 wt pct Al. It was found that the elastic modulus of the composites increased rapidly with increasing boron, with specific stiffness values reaching about two times that of most structural materials. The values of the compression and tensile strengths increased significantly with boron additions. Good tensile ductility was achieved at the level of 10 vol pct B. However, at 20 vol pct B, the Mg-Li composite exhibited only limited tensile ductility (about 2 percent total elongation).
Document ID
19890039189
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Whalen, R. T.
(NASA Ames Research Center Moffett Field, CA, United States)
Gonzalez-Doncel, G.
(Consejo Superior de Investigaciones Cientificas Centro Nacional de Investigaciones Metalurgicas, Madrid, Spain)
Robinson, S. L.
(Sandia National Laboratories Livermore, CA, United States)
Sherby, O. D.
(Stanford University CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Scripta Metallurgica
Volume: 23
ISSN: 0036-9748
Subject Category
Metallic Materials
Accession Number
89A26560
Funding Number(s)
CONTRACT_GRANT: N00014-82-K-0314
Distribution Limits
Public
Copyright
Other

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