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Title: THE EFFECTS OF FAST REACTOR IRRADIATION CONDITIONS ON THE TENSILE PROPERTIES OF TWO FERRITIC/MARTENSITIC STEELS

Abstract

Tensile testing has been performed at 25 and at ~400°C on two ferritic/martensitic steels (JFMS and HT-9) after irradiation in FFTF to up to ~70 dpa at 373 to 433°C. As observed in previous studies, this range of irradiation temperatures has a significant effect on hardening. The percent increase in yield stress decreases with increasing irradiation temperature from 373 to 433ºC. The JFMS alloy, which has 0.7 wt. % silicon, exhibits approximately a factor of two increase in yield strength between tests at 427°C and at 373°C, and shows an increase in hardening with increasing dose. A comparison of the JFMS tensile properties to the properties of other ferritic/martensitic steels suggests that this hardening is due to precipitation of a Si-rich Laves phase in this alloy. The HT-9 alloy, which contains more chromium and more carbon but less silicon (0.2 wt. %), less molybdenum and less nickel, hardens during irradiation at 373°C, but shows less hardening for irradiations performed at 427ºC and no increase in yield stress with increasing dose beyond 10 dpa.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
920550
Report Number(s):
PNNL-SA-53992
AF5820100
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials, 356(1-3):62-69
Country of Publication:
United States
Language:
English
Subject:
neutron irradiation; FFTF; ferritic/martensitic steel; fast reactor

Citation Formats

Maloy, Stuart A., Toloczko, Mychailo B., McClellan, K. J., Romero, T. J., Kohno, Y., Garner, Francis A., Kurtz, Richard J., and Kimura, Akihiko. THE EFFECTS OF FAST REACTOR IRRADIATION CONDITIONS ON THE TENSILE PROPERTIES OF TWO FERRITIC/MARTENSITIC STEELS. United States: N. p., 2006. Web. doi:10.1016/j.jnucmat.2006.05.024.
Maloy, Stuart A., Toloczko, Mychailo B., McClellan, K. J., Romero, T. J., Kohno, Y., Garner, Francis A., Kurtz, Richard J., & Kimura, Akihiko. THE EFFECTS OF FAST REACTOR IRRADIATION CONDITIONS ON THE TENSILE PROPERTIES OF TWO FERRITIC/MARTENSITIC STEELS. United States. doi:10.1016/j.jnucmat.2006.05.024.
Maloy, Stuart A., Toloczko, Mychailo B., McClellan, K. J., Romero, T. J., Kohno, Y., Garner, Francis A., Kurtz, Richard J., and Kimura, Akihiko. Fri . "THE EFFECTS OF FAST REACTOR IRRADIATION CONDITIONS ON THE TENSILE PROPERTIES OF TWO FERRITIC/MARTENSITIC STEELS". United States. doi:10.1016/j.jnucmat.2006.05.024.
@article{osti_920550,
title = {THE EFFECTS OF FAST REACTOR IRRADIATION CONDITIONS ON THE TENSILE PROPERTIES OF TWO FERRITIC/MARTENSITIC STEELS},
author = {Maloy, Stuart A. and Toloczko, Mychailo B. and McClellan, K. J. and Romero, T. J. and Kohno, Y. and Garner, Francis A. and Kurtz, Richard J. and Kimura, Akihiko},
abstractNote = {Tensile testing has been performed at 25 and at ~400°C on two ferritic/martensitic steels (JFMS and HT-9) after irradiation in FFTF to up to ~70 dpa at 373 to 433°C. As observed in previous studies, this range of irradiation temperatures has a significant effect on hardening. The percent increase in yield stress decreases with increasing irradiation temperature from 373 to 433ºC. The JFMS alloy, which has 0.7 wt. % silicon, exhibits approximately a factor of two increase in yield strength between tests at 427°C and at 373°C, and shows an increase in hardening with increasing dose. A comparison of the JFMS tensile properties to the properties of other ferritic/martensitic steels suggests that this hardening is due to precipitation of a Si-rich Laves phase in this alloy. The HT-9 alloy, which contains more chromium and more carbon but less silicon (0.2 wt. %), less molybdenum and less nickel, hardens during irradiation at 373°C, but shows less hardening for irradiations performed at 427ºC and no increase in yield stress with increasing dose beyond 10 dpa.},
doi = {10.1016/j.jnucmat.2006.05.024},
journal = {Journal of Nuclear Materials, 356(1-3):62-69},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 15 00:00:00 EDT 2006},
month = {Fri Sep 15 00:00:00 EDT 2006}
}