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

0510160 - ÚFM 2020 RIV CH eng J - Článek v odborném periodiku
Husák, Roman - Hadraba, Hynek - Chlup, Zdeněk - Heczko, Milan - Kruml, Tomáš - Puchý, V.
ODS EUROFER Steel Strengthened by Y-(Ce, Hf, La,
Sc, and Zr) Complex Oxides.
Metals. Roč. 9, č. 11 (2019), č. článku 1148. E-ISSN 2075-4701
Grant CEP: GA ČR(CZ) GA17-23964S
Institucionální podpora: RVO:68081723
Klíčová slova: oxide dispersion-strengthened steel * low-activation steel * mechanical alloying * spark plasma sintering * complex oxide
Obor OECD: Materials engineering
Impakt faktor: 2.117, rok: 2019
Způsob publikování: Open access
https://www.mdpi.com/2075-4701/9/11/1148/htm

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 e ect.
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
Trvalý link: http://hdl.handle.net/11104/0302522