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Effects of Superimposed Pressure on Flow and Fracture of Two Bulk Amorphous Metals

Published online by Cambridge University Press:  11 February 2011

Paul Wesseling ,
Peravudh Lowhahphandu  and
John J. Lewandowski
Paul Wesseling
Affiliation:
Case Western Reserve University, Department of Materials Science and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, U.S.A.
Peravudh Lowhahphandu
Affiliation:
Case Western Reserve University, Department of Materials Science and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, U.S.A.
John J. Lewandowski
Affiliation:
Case Western Reserve University, Department of Materials Science and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, U.S.A.
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Abstract

Tension and compression tests have been performed with high alignment fixtures on two different zirconium-based bulk metallic glass specimens at atmospheric pressure as well as with levels of superimposed hydrostatic pressure up to 700 MPa. The results show essentially no difference in applied flow stress or fracture stress between compression and tension specimens over the range of pressures tested. However, a difference in fracture plane angle between compression and tension specimens was observed, suggesting a normal stress effect, as in granular solids, on the flow and fracture behavior of the bulk metallic glass specimens. The data are compared to various flow and fracture theories over a very wide range of normal stresses. Over the range tested, a Mohr-Coulomb flow theory appears to best describe the data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 754: Symposium CC – Supercooled Liquids, Glass Transition and Bulk Metallic Glasses , 2002 , CC11.10
Copyright
Copyright © Materials Research Society 2003

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References

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