| Numéro |
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82International Conference on Martensitic Transformations |
|
|---|---|---|
| Page(s) | C4-449 - C4-454 | |
| DOI | https://doi.org/10.1051/jphyscol:1982469 | |
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-449-C4-454
DOI: 10.1051/jphyscol:1982469
THE INCOMPLETE BAINITE REACTION : POSSIBLE REASONS FOR THE APPARENT DIFFERENCES IN TEM AND ATOM PROBE DETERMINATION OF AUSTENITE CARBON CONTENT
D.J. Hall, H.K.D.H. Bhadeshia et W.M. StobbsDepartment of Metallurgy and Materials Science, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, U.K.
Abstract
Carbon segregation following the transformation of 0.43C2.02Si 3.00Mn and 0.39C 2.05Si 4.09Ni (wt.pct.) steels to bainite has been studied by both atom probe and TEM lattice fringe techniques. The inferred carbon concentrations in the retained austenite are in general agreement with the theory that bainitic ferrite grows with the parent austenite carbon content (i.e. fully-supersaturated). However, "indirect" lattice fringe measurements suggest a broader spread for the carbon contents than the "direct" atom probe results. In this paper, we present further confirmatory data using the former approach and investigate the possible causes for the apparent inconsistency between the techniques. In particular we consider in detail the effect of the retained constrained elastic strains, associated with the transformation, on the TEM results.