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Strength asymmetry of ductile dendrites reinforced Zr- and Ti-based composites

Published online by Cambridge University Press:  03 March 2011

F.F. Wu ,
Z.F. Zhang ,
A. Peker ,
S.X. Mao ,
J. Das  and
J. Eckert
F.F. Wu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Z.F. Zhang*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
A. Peker
Affiliation:
Liquidmetal Technologies, Inc., Lake Forest, California 92630
S.X. Mao
Affiliation:
Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
J. Das
Affiliation:
Physical Metallurgy Division, Department of Materials and Geo Sciences, Darmstadt University of Technology, D-64287 Darmstadt, Germany
J. Eckert*
Affiliation:
Physical Metallurgy Division, Department of Materials and Geo Sciences, Darmstadt University of Technology, D-64287 Darmstadt, Germany
*
a) Address all correspondence to this author. e-mail: [email protected]
b) This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to https://www.mrs.org/publications/jmr/policy.html.
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Abstract

We report on significant asymmetry phenomena, including failure mode, fracture strength, and plasticity under compression and tension, for Zr- and Ti-based composites containing ductile dendrites. The failure of the Zr-based composite always occurs in a shear mode with a small strength asymmetry and different plasticity under tension and compression. In contrast, the Ti-based composite exhibits a significant high strength asymmetry and zero tensile plasticity although its compressive plasticity is high. We propose that the ratio, α=τ0/σ0 (τ0 and σ0 are the intrinsic shear and cleavage strengths), is a substantial parameter controlling the strength asymmetry and the failure mode of various materials.

Keywords

CompositeFractureStrength
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 9 , September 2006 , pp. 2331 - 2336
Copyright
Copyright © Materials Research Society 2006

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References

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