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Atomistic investigations of kappa-carbide precipitation in austenitic Fe-Mn-Al-C lightweight steels and the effect of Mo addition SCIE SCOPUS
- Title
- Atomistic investigations of kappa-carbide precipitation in austenitic Fe-Mn-Al-C lightweight steels and the effect of Mo addition
- Authors
- Moon, J; Park, S.-J; Jang, J.H; Lee, T.-H; Lee, C.-H; Hong, H.-U; Suh, D.-W; Kim, S.H; Han, H.N; Lee, B.H.
- Date Issued
- 2017-01
- Publisher
- Elsevier
- Abstract
- The effect of Mo addition on precipitation behavior of kappa-(Fe,Mn)(3)AlC during aging in austenitic Fe-Mn-Al-C lightweight steels was investigated. First-principles calculations indicate that substitution of Fe or Mn by Mo in kappa-carbide is energetically unfavorable in the respect to formation energy, and it, moreover, increases strain energy contribution to interfacial energy between austenite matrix and kappa-carbide. Atom probe tomography (APT) and transmission electron microscopy (TEM) analysis showed the results consistent with the calculations, i.e., Mo didn't partition into kappa-carbide and delayed kappa-carbide precipitation. Finally, nanoindentation experiments presented that Mo addition changed the aging hardening behavior, corresponding to kappa-carbide precipitation behavior. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
- Keywords
- Lightweight steel; kappa-Carbide precipitation; Atom probe tomography (APT); First-principles calculations; Nanoindentation
- ISSN
- 1359-6462
- Article Type
- Article
- Citation
- SCRIPTA MATERIALIA, vol. 127, page. 97 - 101, 2017-01
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