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ODS EUROFER Steel Strengthened by Y-(Ce, Hf, La, Sc, and Zr) Complex Oxides

1
Institute of Physics of Materials, Czech Academy of Sciences, 616 62 Brno, Czech Republic
2
CEITEC, Institute of Physics of Materials, Czech Academy of Sciences, 616 62 Brno, Czech Republic
3
Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
*
Author to whom correspondence should be addressed.
Metals 2019, 9(11), 1148; https://doi.org/10.3390/met9111148
Received: 7 October 2019 / Revised: 22 October 2019 / Accepted: 24 October 2019 / Published: 26 October 2019
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 µm, respectively. Using this strategy, the yield strength of the prepared alloys varied between 550 MPa and 950 MPa depending on the doping element. View Full-Text
Keywords: oxide dispersion-strengthened steel; low-activation steel; mechanical alloying; spark plasma sintering; complex oxide oxide dispersion-strengthened steel; low-activation steel; mechanical alloying; spark plasma sintering; complex oxide
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MDPI and ACS Style

Husák, R.; Hadraba, H.; Chlup, Z.; Heczko, M.; Kruml, T.; Puchý, V. ODS EUROFER Steel Strengthened by Y-(Ce, Hf, La, Sc, and Zr) Complex Oxides. Metals 2019, 9, 1148.

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