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Fatigue Behaviour and Crack Initiation in CoCrFeNiMn High-Entropy Alloy Processed by Powder Metallurgy
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SYSNO ASEP 0510156 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fatigue Behaviour and Crack Initiation in CoCrFeNiMn High-Entropy Alloy Processed by Powder Metallurgy Author(s) Chlup, Zdeněk (UFM-A) RID, ORCID
Fintová, Stanislava (UFM-A) ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Kuběna, Ivo (UFM-A) RID, ORCID
Vilémová, Monika (UFP-V) RID, ORCID
Matějíček, Jiří (UFP-V) RID, ORCIDNumber of authors 6 Article number 1110 Source Title Metals. - : MDPI
Roč. 9, č. 10 (2019)Number of pages 11 s. Language eng - English Country CH - Switzerland Keywords high entropy alloy ; microstructure ; spark plasma sintering ; fatigue ; grain size Subject RIV JG - Metallurgy OECD category Materials engineering Subject RIV - cooperation Institute of Plasma Physics R&D Projects GA17-23964S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFM-A - RVO:68081723 ; UFP-V - RVO:61389021 UT WOS 000498219400089 EID SCOPUS 85074239473 DOI 10.3390/met9101110 Annotation Oxide dispersion-strengthened (ODS) materials contain homogeneous dispersions of temperature-stable nano-oxides serving as obstacles for dislocations and further pinning of grain boundaries. The strategy for dispersion strengthening based on complex oxides (Y-Hf, -Zr, -Ce, -La) was developed in order to refine oxide dispersion to enhance the dispersion strengthening effect. In this work, the strengthening of EUROFER steel by complex oxides based on Y and elements of the IIIB group (lanthanum, scandium) and IVB group (cerium, hafnium, zirconium) was explored. Interparticle spacing as a dispersoid characteristic appeared to be an important factor in controlling the dispersion strengthening contribution to the yield strength of ODS EUROFER steels. The dispersoid size and average grain size of ODS EUROFER steel were altered in the ranges of 5–13 nm and 0.6–1.7 m, respectively. Using this strategy, the yield strength of the prepared alloys varied between 550 MPa and 950 MPa depending on the doping element. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2020 Electronic address https://www.mdpi.com/2075-4701/9/10/1110/htm
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