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Impact of nanodiffusion on the stacking fault energy in high-strength steels

Hickel, T., Sandlöbes, S., Marceau, R. K. W., Dick, A., Bleskov, I., Neugebauer, J. and Raabe, D. 2014, Impact of nanodiffusion on the stacking fault energy in high-strength steels, Acta materialia, vol. 75, pp. 147-155, doi: 10.1016/j.actamat.2014.04.062.

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Title Impact of nanodiffusion on the stacking fault energy in high-strength steels
Author(s) Hickel, T.
Sandlöbes, S.
Marceau, R. K. W.ORCID iD for Marceau, R. K. W. orcid.org/0000-0003-3612-8762
Dick, A.
Bleskov, I.
Neugebauer, J.
Raabe, D.
Journal name Acta materialia
Volume number 75
Start page 147
End page 155
Total pages 9
Publisher Elsevier
Place of publication amsterdam, The Netherlands
Publication date 2014-08-15
ISSN 1359-6454
1873-2453
Keyword(s) stacking fault energy
iron
carbon
in situ TEM
DFT
Summary A key requirement of modern steels – the combination of high strength and high deformability – can best be achieved by enabling a local adaptation of the microstructure during deformation. A local hardening is most efficiently obtained by a modification of the stacking sequence of atomic layers, resulting in the formation of twins or martensite. Combining ab initio calculations with in situ transmission electron microscopy, we show that the ability of a material to incorporate such stacking faults depends on its overall chemical composition and, importantly, the local composition near the defect, which is controlled by nanodiffusion. Specifically, the role of carbon for the stacking fault energy in high-Mn steels is investigated. Consequences for the long-term mechanical properties and the characterisation of these materials are discussed.
Language eng
DOI 10.1016/j.actamat.2014.04.062
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2014, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30064256

Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Wed, 11 Jun 2014, 14:59:00 EST by Ross Marceau

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