Segregation of carbon atoms to dislocations in low-carbon martensites: studies by field ion microscopy and atom probe microanalysis

Li Chang*, S. J. Barnard, G. D.W. Smith

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

34 Scopus citations

Abstract

The absence of tetragonality in low carbon ferrous martensites was explained by Speich in terms of the redistributions of carbon atoms to lattice defects such as dislocations. However, until recently no experimental techniques were available to measure carbon atom distribution directly. Atom probe microanalysis has now been used to demonstrate unequivocally that carbon atom segregation to dislocations occurs in these microstructures. Observations of so-called 'Cottrell atmospheres' surrounding dislocations in low carbon martensites are presented. The interpretation of these results is discussed in terms of the theory of dislocation-solute interactions.

Original languageEnglish
Title of host publicationGilbert R Speich Symp Proc Fundam Aging Tempering Bainitic Martensitic Steel Prod
Editors Anon
PublisherPubl by Iron & Steel Soc of AIME
Pages19-28
Number of pages10
ISBN (Print)0932897770
StatePublished - 1992
EventGilbert R. Speich Symposium Proceedings on Fundamentals of Aging and Tempering in Bainitic and Martensitic Steel Products - Montreal, Que, Can
Duration: 25 Oct 199228 Oct 1992

Publication series

NameGilbert R Speich Symp Proc Fundam Aging Tempering Bainitic Martensitic Steel Prod

Conference

ConferenceGilbert R. Speich Symposium Proceedings on Fundamentals of Aging and Tempering in Bainitic and Martensitic Steel Products
CityMontreal, Que, Can
Period25/10/9228/10/92

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