Susila, P. ; Sturm, D. ; Heilmaier, M. ; Murty, B. S. ; Subramanya Sarma, V. (2011) Effect of yttria particle size on the microstructure and compression creep properties of nanostructured oxide dispersion strengthened ferritic (Fe-12Cr-2W-0.5Y2O3) alloy Materials Science and Engineering: A, 528 (13-14). pp. 4579-4584. ISSN 0921-5093
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.msea.2011.02.078
Abstract
In the present paper, microstructural characterization and compression creep properties of nanostructured ferritic oxide dispersion strengthened alloys (Fe-12Cr-2W-0.5Y2O3 (in wt.%)) synthesized by mechanical alloying and vacuum hot pressing are presented. In particular, the effect of starting yttria particle size (20 nm and 45 µm before mechanical alloying) on microstructure and creep properties was investigated. Study of compression creep properties (at 800 ° C and 900 ° C) revealed that the ODS alloy with finer dispersoids showed higher creep resistance. Grain growth was not very significant following creep testing at 800 ° C (from ~300 nm in hot pressed condition to ~550 nm following creep at 800 ° C). Analysis of stress exponents indicates that dislocation creep is the dominant deformation mechanism at 800 ° C and 900 ° C.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Oxide Dispersion Strengthened Steels; Mechanical Alloying; Vacuum Hot Pressing; Compression Creep |
| ID Code: | 63993 |
| Deposited On: | 04 Oct 2011 08:44 |
| Last Modified: | 04 Oct 2011 08:44 |
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