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Title: In-reactor creep rupture behavior of the D9 alloys

Conference ·
OSTI ID:6296661

The uncertainties in the in-reactor stress rupture data have been significantly reduced with the acquisition of the Materials Open Test Assembly (MOTA) for testing of materials in the Fast Flux Test Facility (FFTF). The temperature uncertainty associated with irradiation in this vehicle is +- 5/sup 0/C. Moreover, through the use of tag gases and an on-line cover gas monitoring system, on-line detection of specimen ruptures is possible during irradiation, thereby significantly reducing the uncertainty associated with the rupture times. Titanium additions, increases in nickel content and decreases in chromium content, which were made to improve the swelling response of 316 SS, resulted in an alloy class referred to as ''D9''. In-reactor stress rupture data from the MOTA experiment have been reported on two conditions of the D9-type alloys for exposure times corresponding to 2,400 hours at irradiation temperatures of 575, 605, 670, and 750/sup 0/C. For these conditions the in-reactor rupture times were similar to those observed in thermal control tests. This report will describe both the in-reactor stress rupture behavior and the thermal control data for 20% cold work (CW) 316 SS and for 10 and 20% CW D9-type alloy over a similar temperature range for in-reactor exposure times corresponding to 13170 hr. and peak fast fluences corresponding to 17 x 10/sup 22/ n/cm/sup 2/ (E > 0.1 MeV).

Research Organization:
Hanford Engineering Development Lab., Richland, WA (USA)
DOE Contract Number:
AC06-76FF02170
OSTI ID:
6296661
Report Number(s):
HEDL-SA-3548; CONF-860605-44; ON: DE87011480; TRN: 87-030160
Resource Relation:
Conference: 13. international symposium on the effects of radiation on materials, Seattle, WA, USA, 23 Jun 1986; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English

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