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The observation of surface-softening in Fe-based metallic glass

Published online by Cambridge University Press:  09 March 2011

Ansar Masood ,
V. Ström ,
L. Belova ,
J.J. Oak ,
J. Ågren  and
K. V. Rao
Ansar Masood
Affiliation:
Materials Science and Engineering Department, The Royal Institute of Technology, Brinnelvägen 23, 10044, Stockholm, Sweden
V. Ström
Affiliation:
Materials Science and Engineering Department, The Royal Institute of Technology, Brinnelvägen 23, 10044, Stockholm, Sweden
L. Belova
Affiliation:
Materials Science and Engineering Department, The Royal Institute of Technology, Brinnelvägen 23, 10044, Stockholm, Sweden
J.J. Oak
Affiliation:
Institute of Materials Research, Tohoku University, Sendai 980-8577, Japan
J. Ågren
Affiliation:
Materials Science and Engineering Department, The Royal Institute of Technology, Brinnelvägen 23, 10044, Stockholm, Sweden
K. V. Rao
Affiliation:
Materials Science and Engineering Department, The Royal Institute of Technology, Brinnelvägen 23, 10044, Stockholm, Sweden
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Abstract

Depth sensing nano-indentation investigations have been performed to determine the radial dependence of the hardness through the cross section of a Fe-based bulk glassy rod. We have found the hardness of the material decreases along radius from the centre to the outermost surface. This phenomenon is attributed to the ‘cooling rate induced surface softening’. Furthermore, a significant change (~15 %) in elastic modulus is noticed along the radius as well.

Keywords

metalhardnessnano-indentation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1300: Symposium U – Bulk Metallic Glasses and their Applications , 2011 , mrsf10-1300-u10-08
Copyright
Copyright © Materials Research Society 2011

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References

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