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The behaviour of stacking fault energy upon interstitial alloying
Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Pohang 37673, South Korea..
Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Pohang 37673, South Korea.;Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 37673, South Korea..
Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden.;Wigner Res Ctr Phys, Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary..ORCID iD: 0000-0003-2832-3293
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 11074Article in journal (Refereed) Published
Abstract [en]

Stacking fault energy is one of key parameters for understanding the mechanical properties of face-centered cubic materials. It is well known that the plastic deformation mechanism is closely related to the size of stacking fault energy. Although alloying is a conventional method to modify the physical parameter, the underlying microscopic mechanisms are not yet clearly established. Here, we propose a simple model for determining the effect of interstitial alloying on the stacking fault energy. We derive a volumetric behaviour of stacking fault energy from the harmonic approximation to the energy-lattice curve and relate it to the contents of interstitials. The stacking fault energy is found to change linearly with the interstitial content in the usual low concentration domain. This is in good agreement with previously reported experimental and theoretical data.

Place, publisher, year, edition, pages
2017. Vol. 7, article id 11074
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Condensed Matter Physics
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URN: urn:nbn:se:uu:diva-335851DOI: 10.1038/s41598-017-11328-4ISI: 000410063400003PubMedID: 28894163OAI: oai:DiVA.org:uu-335851DiVA: diva2:1177705
Available from: 2018-01-25 Created: 2018-01-25 Last updated: 2018-01-25Bibliographically approved

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