SEDL / STP / STP1046V2-EB / STP49466S

Charpy Impact Test Results of Ferritic Alloys Irradiated to 10 dpa at 55°C

Hu, Wan-Liang
Senior engineervice-president, Westinghouse Hanford CompanyInnovative Technology Laboratory, Richland, WA

Gelles, David S.
Senior engineerstaff scientist, Westinghouse Hanford CompanyPacific Northwest Laboratory, Richland, WA

Pages: 6    Published: Jan 1990

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Abstract

Miniature Charpy specimens of HT-9 in base metal, weld metal, and heat affected zone (HAZ) metal conditions, and 9Cr-1Mo in base metal and weld metal conditions have been tested following irradiation in the High Flux Isotope Reactor (HFIR) at 55°C to ≈5 and 10 dpa. All specimen conditions are found to have degraded properties (both DBTT and USE). 9Cr-Mo degraded more than HT-9, and weld metal performed worse than base metal, which performed worse than HAZ material. As a function of dose, property degradation was approximately linear, indicating that degradation response had not saturated by 10 dpa.