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A Comparison of Grain Boundary Monolayer Segregation Measurements Made Using Fegstem and Auger Spectroscopy

  • S. B. Fisher (a1), P. Spellward (a1), R. Scowen (a1) and B. Lee (a1)

Abstract

The active electron optics suite at Magnox Electric's Berkeley Centre has a VG HB501 FEGSTEM and a FE-sourced Auger Microprobe (a Fisons Microlab-F) which are routinely used for grain boundary chemistry studies in a variety of highly active austenitic and ferritic steels and nickel base alloys.

In a number of investigations sufficient grain boundary data have been obtained to allow a meaningful comparison between the two instruments to be made. It has been established that for the overwhelming majority of materials and conditions there exists a reasonable correlation between the two sets of compositional (on-boundary) data.

This paper presents this correlation and gives a simple theoretical description justifying the relationship between the raw data from the instruments. Examples are given of materials and conditions for which the correlation cannot be established and this leads to a discussion of the usefulness of the availability of the correlation.

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1. Goldstein, J.I., Costley, J.L., Lorimar, G.W. and Reed, S.J.B., SEM 1977, edited by Johari, O., (IITRI, Chicago), vol 1, 1977, p315
2. Walmsley, J.C., Spellward, P., Fisher, S.B. and Jenssen, A., “Microchemical characterisation of grain boundaries in irradiated steels”, Proc 7th Int'l Symp on Environmental Degradation of Materials in Nuclear power Systems - Water Reactors (NACE International, Houston TX), 1995, p985
3. Carter, R.D., Damcott, D.L., Atzmon, M., Was, G.S., Bruemmer, S.M. and Kenik, E.A., J. Nucl.Mater., 221 (1994), p70

A Comparison of Grain Boundary Monolayer Segregation Measurements Made Using Fegstem and Auger Spectroscopy

  • S. B. Fisher (a1), P. Spellward (a1), R. Scowen (a1) and B. Lee (a1)

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