Evaluation of the upper shelf energy for ferritic steels from miniaturized Charpy specimen data
- Tohoku Univ., Oarai, Ibaraki (Japan). Inst. for Materials Research
- Power Reactor and Nuclear Fuel Development Corp., Oarai, Ibaraki (Japan)
The small specimen technology is required in mechanical testing of irradiated materials because of very limited irradiation volume in currently available high flux reactors and future accelerator-based high energy neutron sources. In order to develop the methodology to evaluate the upper shelf energy (USE) for full size Charpy specimens of ferritic steels from miniaturized specimen data, the effects of specimen size and notch dimensions (notch root radius and notch depth) on the USE were studied for high strength ferritic steels with relatively low USE values of 135 and 107 J. The USE for miniaturized specimens, normalized by Bb{sup 2} or (Bb){sup 3/2} (B is the specimen thickness, b is the ligament size), was essentially independent of specimen size and tended to decrease with increasing the elastic stress concentration factor, K{sub t}, but the K{sub t} dependence was not significant. The normalized USE for full size specimens was considerably lower than that for miniaturized specimens. A general relationship was found that allows to determine the USE of full size specimens of ferritic steels directly from miniaturized specimen data.
- OSTI ID:
- 524831
- Report Number(s):
- CONF-940657-; TRN: 97:016813
- 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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