Phase evolution and corrosion performance of laser processed oxide dispersion strengthened ferritic alloys
Document Type
Conference Proceeding
Publication Date
1-1-2018
Abstract
The application of laser processing as a surface treatment method on oxide dispersion strengthened (ODS) Fe-14Cr ferritic alloys, Fe-14Cr-3W-0.3Ti-xY2O3 (x=0.3, 0.6, 0.9) (wt%), was examined in this paper. The ODS ferritic alloys with different amount of Y2O3 particles were prepared by mechanical milling and subsequently consolidated by spark plasma sintering (SPS). The effect of surface laser processing on the corrosion behavior was investigated for these ODS alloys with different oxide contents. The corrosion behaviors of SPS consolidated ODS samples with subsequent laser melting/solidification were examined by the means of electrochemical tests and compared with the untreated ODS samples in salt water. Results indicated that for samples without laser treatment, powders are mainly in their elemental state. However, after laser processing, the formation of passive layer and the improvement in the corrosion resistance are noticeable. CALculation of PHAse Diagrams (CALPHAD) calculations were used to identify the equilibrium phases and compared well with the experimental results.
Publication Source (Journal or Book title)
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Recommended Citation
Ettefagh, A., Wen, H., Lu, F., & Guo, S. (2018). Phase evolution and corrosion performance of laser processed oxide dispersion strengthened ferritic alloys. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), 8B-2018 https://doi.org/10.1115/imece2018-86736