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14Cr-ODS Steel Produced by SPS from Mechanical Milled Powders with High Efficiency Oxide Precursors Incorporation
Version 1
: Received: 12 February 2021 / Approved: 17 February 2021 / Online: 17 February 2021 (10:10:06 CET)
How to cite: Macia, E. 14Cr-ODS Steel Produced by SPS from Mechanical Milled Powders with High Efficiency Oxide Precursors Incorporation. Preprints 2021, 2021020366 Macia, E. 14Cr-ODS Steel Produced by SPS from Mechanical Milled Powders with High Efficiency Oxide Precursors Incorporation. Preprints 2021, 2021020366
Abstract
Currently, one of the biggest issues when developing an ODS alloy is the competition established between the different oxide precursors during the precipitation of oxides which nature depends on their chemical composition. In the presence of various precursors, usually the one with the highest affinity to oxygen leads to the absence of the other oxides. In this work, a new process to equilibrate the local concentration of species and to decrease the competition among them is explained. A unique compound, containing the diverse oxide precursors as one complex oxide, is introduced in a prealloyed 14Cr Steel powder via mechanical alloying. Thus, generating environments enriched in Y, Ti and Zr which, after consolidation, refine the oxides precipitation improving the thermal stability of the alloy. SPS were used as consolidation technique to guarantee shorter sintering times and to maintain the nanostructure obtained. Mechanical properties were tested by tensile tests and Vickers microhardness.
Keywords
ODS steel; mechanical alloying; spark plasma sintering; zirconium; co-precipitation
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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