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Effects of Hydrogen on the Internal Time Scales in Zr-Ti-Ni-Cu-Be Bulk Metallic Glasses

Published online by Cambridge University Press:  17 March 2011

Daewoong Suh  and
Reinhold H. Dauskardt
Daewoong Suh
Affiliation:
Department of Materials Science and EngineeringStanford University, Stanford, CA 94305-2205
Reinhold H. Dauskardt
Affiliation:
Department of Materials Science and EngineeringStanford University, Stanford, CA 94305-2205
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Abstract

The effects of pre-charged hydrogen on various kinetic processes in a Zr-Ti-Ni-Cu-Be bulk metallic glass alloy were investigated. Hydrogen charging induced longer internal time scales for structural relaxation and viscous flow. Crystallization was retarded by hydrogen charging leading to enhanced glass stability. Positron annihilation spectroscopy indicated reduced average free volume size after hydrogen charging. The reduced free volume and higher viscosity caused by hydrogen retard the plastic deformation and are believed to be responsible for hydrogen embrittlement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 644: Symposium L – Supercooled Liquid, Bulk Glassy and Nanocrystalline State of Alloys , 2000 , L10.3
Copyright
Copyright © Materials Research Society 2001

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