Influence of thermomechanical treatment on irradiation microstructure in an ODS ferritic steel
- University College, Swansea (United Kingdom). Dept. of Materials Engineering
The effects of thermomechanical treatment on microstructural changes and void swelling in a DT2203YO5-grade 13%Cr oxide-dispersion-strengthened (ODS) ferritic alloy have been studied following ion irradiations to a damage level of 50 dpa at 475 C with 600 appm helium gas implantation. Swelling in a solution treated and aged (STA) condition ranges from 0.07 to 0.24% due to cast-to-cast variations, while in a solution treated, cold-worked and aged (STCWA) condition the swelling decreases to 0.025%. Cavities are in general irregularly shaped, non-uniformly distributed and frequently attached to small yttria dispersoid particles. The results confirm that this ODS ferritic steel exhibits low irradiation-induced swelling in the presence of high gas concentrations as required for advanced fast and fusion reactor applications. The observed sensitivity of irradiation-induced swelling to compositional or processing variables implies that ODS ferritic alloys can be further optimized for high radiation resistance.
- OSTI ID:
- 524829
- Report Number(s):
- CONF-940657-; TRN: 97:016811
- Resource Relation:
- Conference: 17. symposium on effects of radiation on materials, Sun Valley, ID (United States), 20-23 Jun 1994; Other Information: PBD: 1996; Related Information: Is Part Of Effects of radiation on materials: 17. international symposium; Gelles, D.S. [ed.] [Pacific Northwest National Lab., Richland, WA (United States)]; Nanstad, R.K. [ed.] [Oak Ridge National Lab., TN (United States)]; Kumar, A.S. [ed.] [Univ. of Missouri, Rolla, MO (United States)]; Little, E.A. [ed.] [University College of Swansea (United Kingdom)]; PB: [1175] p.; ASTM special technical publication, 1270
- Country of Publication:
- United States
- Language:
- English
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