Abstract
Addition of yttria to steels has been proposed for the fabrication of oxide-dispersion-strengthened materials for nuclear power applications. We have investigated materials prepared from 12 Cr martensitic stainless steel, AISI 410L, produced by powder metallurgy. Materials were produced with and without yttria addition, and two different sizes of yttria were used, 0.9 µm and 50 nm. Tensile and mini-creep tests were performed to determine mechanical properties. Optical microscopy, SEM, TEM, and EDX analysis were used to investigate the microstructures and deformation mechanisms and to obtain information about non-metallic inclusion particles. SiO2, MnS, and Y2Si2O7 inclusion particles were observed. An SiO2 and Y2O3 interaction was seen to have occurred during the ball milling, which impaired the final mechanical properties. Small-angle neutron scattering experiments showed that the matrix chemistry prevented effective dissolution of the yttria.
| Original language | English |
|---|---|
| Journal | Journal of Materials Engineering and Performance |
| Volume | In press |
| Early online date | 11 Apr 2014 |
| DOIs | |
| Publication status | Published - Jun 2014 |
Bibliographical note
This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.This article is published with open access at Springerlink.com
Funder
This project was supported by the RCUK Energy Programme, and we are grateful to EPSRC for funding via the PROMINENT Nuclear Fission consortium grant. MEF is grateful for funding from the Lloyd’s Register FoundationKeywords
- advanced characterization
- creep and stress rupture
- mechanical
- powder metallurgy