| Numéro |
J. Phys. Colloques
Volume 50, Numéro C8, Novembre 1989
36th International Field Emission Symposium
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|---|---|---|
| Page(s) | C8-361 - C8-364 | |
| DOI | https://doi.org/10.1051/jphyscol:1989861 | |
36th International Field Emission Symposium
J. Phys. Colloques 50 (1989) C8-361-C8-364
DOI: 10.1051/jphyscol:1989861
1 Materials Science Section, Department of Mechanical Engineering, University of Twente, PO. Box 217, NL-7500 AE Enschede, The Netherlands
2 SGM (Foundation for Advanced Metals Science), PO. Box 8039, NL-7550 KA Hengelo, The Netherlands
J. Phys. Colloques 50 (1989) C8-361-C8-364
DOI: 10.1051/jphyscol:1989861
CHROMIUM CONCENTRATION IN AND AROUND FERRITE-AUSTENITE PHASE BOUNDARIES IN DUPLEX STAINLESS STEELS
V. J. GADGIL1, J.J. SWENS2 et B.H. KOLSTER1, 21 Materials Science Section, Department of Mechanical Engineering, University of Twente, PO. Box 217, NL-7500 AE Enschede, The Netherlands
2 SGM (Foundation for Advanced Metals Science), PO. Box 8039, NL-7550 KA Hengelo, The Netherlands
Abstract
Austenitic-ferritic duplex stainless steels, tested for pitting corrosion, show pit initiation on ferrite-austenite phase boundaries. Hot worked, solutionised and water quenched material was investigated. The AP FIM was used to determine the local composition, and the chromium concentration in and around the ferrite-austenite grain boundaries. The analysis indicates a phase boundary carbide. It was found that there is a region of Chromium depletion on either side of the phase boundary.