Change search
ReferencesLink to record
Permanent link

Direct link
Generalized stacking fault energy of gamma-Fe
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics. Uppsala University, Sweden. (ENHETEN EGENSKAPER)
Show others and affiliations
2016 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 96, no 6, 524-541 p.Article in journal (Refereed) PublishedText
Abstract [en]

We investigate the generalized stacking fault energy ( [GRAPHICS] -surface) of paramagnetic [GRAPHICS] -Fe as a function of temperature. At static condition, the face-centred cubic (fcc) lattice is thermodynamically unstable with respect to the hexagonal close-packed lattice, resulting in a negative intrinsic stacking fault energy (ISF). However, the unstable stacking fault energy (USF), representing the energy barrier along the [GRAPHICS] -surface connecting the ideal fcc and the intrinsic stacking fault positions, is large and positive. The ISF is calculated to have a strong positive temperature coefficient, while the USF decreases monotonously with temperature. According to the recent plasticity theory, the overall effect of temperature is to move paramagnetic fcc Fe from the stacking fault formation regime ( [GRAPHICS] K) towards maximum twinning ( [GRAPHICS] K) and finally to a dominating full-slip regime ( [GRAPHICS] K). Our predictions are discussed in connection with the available experimental observations.

Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 96, no 6, 524-541 p.
Keyword [en]
-Fe, plasticity, stacking fault energy
National Category
Metallurgy and Metallic Materials Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-185076DOI: 10.1080/14786435.2016.1140912ISI: 000372097300001ScopusID: 2-s2.0-84960459101OAI: oai:DiVA.org:kth-185076DiVA: diva2:919739
Note

QC 20160414

Available from: 2016-04-14 Created: 2016-04-11 Last updated: 2016-04-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Lu, SongJohansson, BörjeVitos, Levente
By organisation
Applied Material Physics
In the same journal
Philosophical Magazine
Metallurgy and Metallic MaterialsCondensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 10 hits
ReferencesLink to record
Permanent link

Direct link