Fracture toughness testing on ferritic alloys using the electropotential technique
Fracture toughness measurements as done conventionally require large specimens (5 x 5 x 2.5 cm) which would be prohibitively expensive to irradiate over the fluence and temperature ranges required for first wall design. To overcome this difficulty a single specimen technique for J intergral fracture toughness measurements on miniature specimens (1.6 cm OD x 0.25 cm thick) was developed. Comparisons with specimens three times as thick show that the derived J/sub 1c/ is constant, validating the specimen for first wall applications. The electropotential technique was used to obtain continuous crack extension measurements, allowing a ductile fracture resistence curve to be constructed from a single specimen. The irradiation test volume required for fracture toughness measurements using both miniature specimens and single specimen J measurements was reduced a factor of 320, making it possible to perform a systematic exploration of irradiation temperature and dose variables as required for qualification of HT-9 and 9Cr-1Mo base metal and welds for first wall application. Fracture toughness test results for HT-9 and 9Cr-1Mo from 25 to 539/sup 0/C are presented to illustrate the single specimen technique.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC14-76FF02170
- OSTI ID:
- 6042370
- Report Number(s):
- HEDL-SA-2474-FP; CONF-810831-43; ON: DE81029776; TRN: 81-016774
- Resource Relation:
- Conference: Fusion reactor materials meeting, Seattle, WA, USA, 9 Aug 1981
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fracture toughness of ferritic alloys irradiated in HFIR
Fracture toughness data base for ferritic alloys in the fusion program
Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALLOY-HT-9
FRACTURE PROPERTIES
CHROMIUM STEELS
IRON BASE ALLOYS
DUCTILITY
FIRST WALL
HIGH TEMPERATURE
MECHANICAL PROPERTIES
ALLOYS
CHROMIUM ALLOYS
CHROMIUM-MOLYBDENUM STEELS
IRON ALLOYS
STEELS
TENSILE PROPERTIES
THERMONUCLEAR REACTOR WALLS
360103* - Metals & Alloys- Mechanical Properties
700209 - Fusion Power Plant Technology- Component Development & Materials Testing