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Title: Microstructure and mechanical properties of heat-treated and neutron irradiated TRISO-ZrC coatings

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1252499
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 464; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 15:21:32; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Vasudevamurthy, G., Katoh, Y., Aihara, J., Sawa, K., and Snead, L. L.. Microstructure and mechanical properties of heat-treated and neutron irradiated TRISO-ZrC coatings. Netherlands: N. p., 2015. Web. doi:10.1016/j.jnucmat.2015.04.026.
Vasudevamurthy, G., Katoh, Y., Aihara, J., Sawa, K., & Snead, L. L.. Microstructure and mechanical properties of heat-treated and neutron irradiated TRISO-ZrC coatings. Netherlands. doi:10.1016/j.jnucmat.2015.04.026.
Vasudevamurthy, G., Katoh, Y., Aihara, J., Sawa, K., and Snead, L. L.. Tue . "Microstructure and mechanical properties of heat-treated and neutron irradiated TRISO-ZrC coatings". Netherlands. doi:10.1016/j.jnucmat.2015.04.026.
@article{osti_1252499,
title = {Microstructure and mechanical properties of heat-treated and neutron irradiated TRISO-ZrC coatings},
author = {Vasudevamurthy, G. and Katoh, Y. and Aihara, J. and Sawa, K. and Snead, L. L.},
abstractNote = {},
doi = {10.1016/j.jnucmat.2015.04.026},
journal = {Journal of Nuclear Materials},
number = C,
volume = 464,
place = {Netherlands},
year = {Tue Sep 01 00:00:00 EDT 2015},
month = {Tue Sep 01 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jnucmat.2015.04.026

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • The lamellar structure of ({alpha} + {gamma}) two-phase Ti-Al alloys is known as a promising structure because of its good fracture toughness and creep properties, despite its comparatively low ductility at ambient temperature. The purpose of the present work was to investigate the effect of lamellar structure on the mechanical properties of cast lamellar structure by controlling, as precisely as possible, its lamellar grain size, lamellar spacing, and ordered domain sizes. The volume fraction effect of {alpha}{sub 2} phase has been also investigated. It is normally difficult to obtain a small sized grain (i.e., {approximately}300 {micro}m) in a cast lamellarmore » structure since the grain size of as-cast structure is already large (i.e., {approximately}600 {micro}m). To circumvent this difficulty, the authors have fully coarsened the cast lamellar structure by discontinuous coarsening before solutionizing it in an {alpha} single phase field. This has produced a starting grain size of 10--130 {micro}m, lamellae of which are fully coarsened. The tensile yield stress has been measured using a miniaturized disk bend test (MDBT) used by Ardell and his coworkers. This method has, in particular, an advantage to monitor the yield stress of alloys using a small amount of specimen and to control precisely the grain and lamellar sizes of testing specimens because of its small dimension.« less
  • Here, this work reports the first mechanical properties of Ti 3AlC 2-Ti 5Al 2C 3 materials neutron irradiated at ~400, 630 and 700 °C at a fluence of 2 × 10 25 n m -2 (E > 0.1 MeV) or a displacement dose of ~2 dpa. After irradiation at ~400 °C, anisotropic swelling and loss of 90% flexural strength was observed. After irradiation at ~630–700 °C, properties were unchanged. Microcracking and kinking-delamination had occurred during irradiation at ~630–700 °C. Further examination showed no cavities in Ti 3AlC 2 after irradiation at ~630 °C, and MX and A lamellae were preserved.more » However, disturbance of (0004) reflections corresponding to M-A layers was observed, and the number density of line/planar defects was ~10 23 m -3 of size 5–10 nm. HAADF identified these defects as antisite Ti Al atoms. Finally, Ti 3AlC 2-Ti 5Al 2C 3 shows abrupt dynamic recovery of A-layers from ~630 °C, but a higher temperature appears necessary for full recovery.« less