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A high specific strength, deformation-processed scandium-titanium composite

Published online by Cambridge University Press:  26 July 2012

A. M. Russell,
Y. Tian,
J. D. Rose,
T. W. Ellis and
L. S. Chumbley
A. M. Russell
Affiliation:
Ames Laboratory, Iowa State University, Ames, Iowa 50011
Y. Tian
Affiliation:
Ames Laboratory, Iowa State University, Ames, Iowa 50011
J. D. Rose
Affiliation:
U.S. Steel Company, Gary, Indiana 46402
T. W. Ellis
Affiliation:
Kulicke & Soffa Industries, Inc., Willow Grove, Pennsylvania 19090
L. S. Chumbley
Affiliation:
Ames Laboratory, Iowa State University, Ames, Iowa 50011
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A 59% Sc–41% Ti deformation-processed metal-metal composite was produced by rolling to a true strain of 2.3 at 873 K followed by cold rolling to a total true strain of 3.6. Rolling reduced the original eutectoid microstructure to lamellae of α–Sc and α–Ti with average lamellar thicknesses of 150 nm (Sc) and 120 nm (Ti). The cold-rolledmaterial had an ultimate tensile strength of 942 MPa and a specific strength of 259 J/g. The Sc matrix was oriented with the 〈0001〉 tilted 22° from the sheet normal direction toward the rolling direction, an unusual texture for an HCP metal with a low c/a ratio, which suggests Sc may deform primarily by basal slip.

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Articles
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Journal of Materials Research , Volume 14 , Issue 1 , January 1999, pp. 8 - 11
Copyright
Copyright © Materials Research Society 1999

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