RT Journal Article
T1 Development of New 14 Cr ODS Steels by Using New Oxides Formers and B as an Inhibitor of the Grain Growth
A1 Meza Manzaneque, Juan Alberto
A1 Macía Rodríguez, Eric
A1 García-Junceda, Andrea
A1 Díaz, Luis Antonio
A1 Chekhonin, Paul
A1 Altstadt, Eberhard
A1 Serrano, Marta
A1 Rabanal Jiménez, María Eugenia
A1 Campos Gómez, Mónica
AB In this work, new oxide dispersion strengthened (ODS) ferritic steels have been produced by powder metallurgy using an alternative processing route and characterized afterwards by comparing them with a base ODS steel with Y2O3 and Ti additions. Different alloying elements like boron (B), which is known as an inhibitor of grain growth obtained by pinning grain boundaries, and complex oxide compounds (Y-Ti-Zr-O) have been introduced to the 14Cr prealloyed powder by using mechanical alloying (MA) and were further consolidated by spark employing plasma sintering (SPS). Techniques such as x-ray diffraction (XRD), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM) were used to study the obtained microstructures. Micro-tensile tests and microhardness measurements were carried out at room temperature to analyze the mechanical properties of the differently developed microstructures, which was considered to result in a better strength in the ODS steels containing the complex oxide Y-Ti-Zr-O. In addition, small punch (SP) tests were performed to evaluate the response of the material under high temperatures conditions, under which promising mechanical properties were attained by the materials containing Y-Ti-Zr-O (14Al-X-ODS and 14Al-X-ODS-B) in comparison with the other commercial steel, GETMAT. The differences in mechanical strength can be attributed to the precipitate’s density, nature, size, and to the density of dislocations in each ODS steel.
PB MDPI
SN 2075-4701
YR 2020
FD 2020-10
LK https://hdl.handle.net/10016/33124
UL https://hdl.handle.net/10016/33124
LA eng
NO This article belongs to the Special Issue Spark Plasma Sintering of Metals and Metal Matrix Nanocomposites.
NO This research was funded by the Ferro-Ness project and Ferro-Genesys project funded by MINECO under the National I+D+I program MAT2016-80875-C3-3-R and MAT2013-47460-C5-5-P.
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RD 20 may. 2024