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Correlation between Fracture Mechanical and Atom Probe Investigations on Metallic Glass Ribbon

Published online by Cambridge University Press:  25 February 2011

M. Calvo ,
A. Menand ,
F. Osterstock  and
J.L. Chermant
M. Calvo
Affiliation:
Equipe Matriaux—Microstructure de I'U.A. 251, ISMRa—Université, 14032 Caen Cedex, France
A. Menand
Affiliation:
Equipe Microscopie Ionique, U.A. 808, Faculté des Sciences et Techniques de Rouen, 76130 Mont Saint—Aignan, France
F. Osterstock
Affiliation:
Equipe Matriaux—Microstructure de I'U.A. 251, ISMRa—Université, 14032 Caen Cedex, France
J.L. Chermant
Affiliation:
Equipe Matriaux—Microstructure de I'U.A. 251, ISMRa—Université, 14032 Caen Cedex, France
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Abstract

Metallic glasses have good mechanical and magnetical properties. However they embrittle after annealing and/or low temperature testing. In this paper, we describe the rupture of atom probe tips using fracture mechanical measurements. We found boron rich areas which seem to be interconnected and more numerous after annealing and act as crack nuclei. The good correlation between the calculated and the measured size of the critical defect seem to confirm that the boron segregations are on the origin of embrittlement and gives good ground for further straightforward investigations.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 127
Copyright
Copyright © Materials Research Society 1986

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References

REFERENCES

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