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Effects of Annealing and Pressure on Devitrification and Mechanical Properties of Amorphous Al87Ni7Gd6

  • Symposium: Bulk Metallic Glasses IV
  • Published:
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Abstract

Annealing studies at different temperatures, as well as those conducted with 940 MPa hydrostatic pressure, were conducted on amorphous ribbons of Al87Ni7Gd6. The studies were performed to investigate the evolution of structure under different conditions and to particularly examine the effects of superimposed hydrostatic pressure during annealing. This amorphous alloy devitrifies at low temperatures via the precipitation of nano-crystalline α-Al particles. The effects of these various exposures on the amount of devitrification have been quantified using a variety of analytical techniques (i.e., X-ray diffraction (XRD), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM)). In addition, the effects of devitrification on the mechanical properties have been quantified using microhardness indentation and uniaxial tension tests.

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Acknowledgments

Support for this work was provided by the DARPA SAM program via a subcontract with Boeing and Pratt & Whitney. The work has been approved for public release, and its distribution is unlimited. Discussions with A.L. Greer are gratefully acknowledged. The assistance of Professor Hala Hassan in manuscript preparation is also appreciated.

Author information

Author notes

  1. P. Wesseling (Student, Metallurgical Engineer)

    Present address: McWilliams Forge Inc, Rockaway, NJ, 07866, USA

  2. L.O. Vatamanu (Research Associate, Senior Research Scientist)

    Present address: Powdermet Inc, Euclid, OH, 44117, USA

Authors and Affiliations

  1. Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA

    P. Wesseling (Student, Metallurgical Engineer), B.C. Ko (Research Associate), L.O. Vatamanu (Research Associate, Senior Research Scientist) & J.J. Lewandowski (Leonard Case, Jr., Professor of Engineering)

  2. Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA, 22904, USA

    G.J. Shiflet (William G. Reynolds Professor)

Authors
  1. P. Wesseling
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  2. B.C. Ko
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  3. L.O. Vatamanu
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  4. G.J. Shiflet
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  5. J.J. Lewandowski
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Corresponding author

Correspondence to J.J. Lewandowski.

Additional information

This article is based on a presentation given in the symposium entitled “Bulk Metallic Glasses IV,” which occurred February 25–March 1, 2007 during the TMS Annual Meeting in Orlando, Florida under the auspices of the TMS/ASM Mechanical Behavior of Materials Committee.

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Wesseling, P., Ko, B., Vatamanu, L. et al. Effects of Annealing and Pressure on Devitrification and Mechanical Properties of Amorphous Al87Ni7Gd6 . Metall Mater Trans A 39, 1935–1941 (2008). https://doi.org/10.1007/s11661-007-9384-2

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  • DOI: https://doi.org/10.1007/s11661-007-9384-2

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