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Mechanical properties of Fe-based bulk glassy alloys in Fe–B–Si–Nb and Fe–Ga–P–C–B–Si systems

Published online by Cambridge University Press:  31 January 2011

A. Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan
B. L. Shen
Affiliation:
Inoue Superliquid Glass Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Corporation, Sendai 982–0807, Japan
A. R. Yavari
Affiliation:
Laboratorie de Thermodynamique et Physico-chemie Metalliguque (LTPCM), Institut National Polytechnique de Grenoble, CNRS, 38402, France
A. L. Greer
Affiliation:
Department of Materials Science & Metallurgy, University of Cambridge, Cambridge, CB2 3QZ, United Kingdom
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Abstract

Mechanical properties of cast Fe-based bulk glassy alloy rods with compositions of (Fe0.75B0.15Si0.1)96Nb4 and Fe77Ga3P9.5C4B4Si2.5 were examined by compression and Vickers hardness tests. The Young's modulus (E), yield strength (σy), fracture strength (σf), elastic strain (εe), fracture strain (εf), and Vickers hardness (Hv) were 175 GPa, 3165 MPa, 3250 MPa, 1.8%, 2.2%, and 1060, respectively, for the former alloy and 182 GPa, 2980 MPa, 3160 MPa, 1.9%, 2.2%, and 870, respectively, for the latter alloy. The εf /E and Hv/3E were 0.019–0.017 and 0.020–0.016, respectively, for the alloys, in agreement with the previous data for a number of bulk glassy alloys. The agreement suggests that these Fe-based bulk glassy alloys have an elastic–plastic deformation mode. The syntheses of high-strength Fe-based bulk glassy alloys with distinct compressive plastic strain and elastic–plastic deformation mode are encouraging for future development of Fe-based bulk glassy alloys as structural and soft magnetic materials.

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Articles
Copyright
Copyright © Materials Research Society 2003

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References

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