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Yield strength increase of a CoCrNi medium entropy alloy by interstitial nitrogen doping at maintained ductility
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SYSNO ASEP 0524466 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Yield strength increase of a CoCrNi medium entropy alloy by interstitial nitrogen doping at maintained ductility Author(s) Moravčík, I. (CZ)
Hadraba, Hynek (UFM-A) RID, ORCID
Li, L. (DE)
Dlouhý, Ivo (UFM-A) RID, ORCID
Raabe, D. (DE)
Li, Z. (DE)Number of authors 6 Source Title Scripta Materialia. - : Elsevier - ISSN 1359-6462
Roč. 178, MAR (2020), s. 391-397Number of pages 7 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords Interstitials ; Strengthening ; Alloying ; Tension test ; Concentrated solid solution Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GA17-23964S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFM-A - RVO:68081723 UT WOS 000510947200078 EID SCOPUS 85076405382 DOI 10.1016/j.scriptamat.2019.12.007 Annotation We show that interstitial nitrogen doping improves the tensile properties of a CoCrNi alloy. A material with 0.5 at% interstitial nitrogen was compared to a nitrogen-free CoCrNi alloy. The nitrogen-doped variant has a stable, single-phase face-centered cubic (FCC) lattice structure without nitrides, also after different annealing treatments (800–900 °C, 10 and 30 min). The nitrogen caused an increase in yield strength by 24–33% at identical ductility compared to the nitrogen-free material with similar grain size. The strengthening effect of nitrogen was explained in terms of the simultaneous increase of the lattice friction stress and of the Hall-Petch coefficient. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S1359646219307262
Number of the records: 1