Microhardness and elastic modulus of nanocrystalline Al-Zr

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An investigation of the mechanical properties of nanocrystalline Al-Zr alloy composites has been conducted via nanoindentation and Vickers microhardness experiments. The microhardness of the samples exhibits a four-fold increase over the concentration range of 0-30 wt.% Zr, from {approximately}0.7 GPa to nearly 3 GPa. The aluminum grain size is found to be strongly correlated with the level of zirconium present in the samples, suggesting that the observed hardness increase can be attributed to the combined effects of alloying and grain size reduction. The elastic moduli of the nanocrystalline Al-Zr samples are determined to be similar to the modulus of coarse-grained ... continued below

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7 p.

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Rittner, M.N.; Weertman, J.R. & Eastman, J.A. November 1, 1995.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Rittner, M.N. Northwestern Univ., Evanston, IL (United States). Dept. of Science and Engineering
  • Weertman, J.R. Northwestern Univ., Evanston, IL (United States). Dept. of Science and Engineering
  • Eastman, J.A. Argonne National Lab., IL (United States)

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Description

An investigation of the mechanical properties of nanocrystalline Al-Zr alloy composites has been conducted via nanoindentation and Vickers microhardness experiments. The microhardness of the samples exhibits a four-fold increase over the concentration range of 0-30 wt.% Zr, from {approximately}0.7 GPa to nearly 3 GPa. The aluminum grain size is found to be strongly correlated with the level of zirconium present in the samples, suggesting that the observed hardness increase can be attributed to the combined effects of alloying and grain size reduction. The elastic moduli of the nanocrystalline Al-Zr samples are determined to be similar to the modulus of coarse-grained aluminum and independent of zirconium content.

Physical Description

7 p.

Notes

OSTI as DE96005215

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  • Materials Week `95, Cleveland, OH (United States), 29 Oct - 2 Nov 1995

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  • Other: DE96005215
  • Report No.: ANL/MSD/CP--88481
  • Report No.: CONF-951026--6
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 193907
  • Archival Resource Key: ark:/67531/metadc672560

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Creation Date

  • November 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Dec. 16, 2015, 12:56 p.m.

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Rittner, M.N.; Weertman, J.R. & Eastman, J.A. Microhardness and elastic modulus of nanocrystalline Al-Zr, article, November 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc672560/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.