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Micro-Tensile Testing of Nanocrystalline Al/Zr Alloys

Published online by Cambridge University Press:  10 February 2011

M. Legros ,
K. J. Hemker ,
D. A. LaVan ,
W. N. Sharpe Jr ,
M. N. Rittner  and
J. R. Weertman
M. Legros
Affiliation:
Dept. of Mechanical Eng., Johns Hopkins University, Baltimore, MD 21218–2686
K. J. Hemker
Affiliation:
Dept. of Mechanical Eng., Johns Hopkins University, Baltimore, MD 21218–2686
D. A. LaVan
Affiliation:
Dept. of Mechanical Eng., Johns Hopkins University, Baltimore, MD 21218–2686
W. N. Sharpe Jr
Affiliation:
Dept. of Mechanical Eng., Johns Hopkins University, Baltimore, MD 21218–2686
M. N. Rittner
Affiliation:
Dept. Of Materials Science and Eng., Northwestern University, Evanston, IL 60208–3108.
J. R. Weertman
Affiliation:
Dept. Of Materials Science and Eng., Northwestern University, Evanston, IL 60208–3108.

Abstract

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A novel micro testing machine has been used to perform tensile tests on nanocrystalline Al/Zr microsamples with grain sizes ranging from 10 to 250 nm. The problems associated with testing such small specimens (200μm × 200μm in the gage section) were overcome by using a contact-free interferometrie strain gage (ISDG) and alignment and low friction loading were assured by use of a linear air bearing. The postulated relationship between yield stress and hardness was investigated and will be discussed. The effect of the microstructure and the grain size of the compacts on their mechanical behaviour are also analysed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 457: Symposium V – Nanophase and Nanocomposite Materials II , 1996 , 273
Copyright
Copyright © Materials Research Society 1997

References

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