Brazed dispersion strengthened copper: The effect of neutron irradiation and transmutation on bond integrity

Conference · Fri Oct 01 04:00:00 EDT 1999

OSTI ID:679531

Edwards, D J; Hamilton, M L; Garner, F A ^[1]; Samal, P; Troxell, J D ^[2]

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1. Pacific Northwest National Lab., Richland, WA (United States)
2. OMG Americas, Research Triangle Park, NC (United States)

Four types of brazes were used to join sheets of GLIDCOP{trademark} Al25. Miniature tensile specimens were fabricated from the joints and irradiated under various conditions for a study of their response to high temperature neutron irradiation in FFTF. Two of the sets of specimens, brazed with TiCuAg and TiCuNi, were found to possess low quality joints because of excessive diffusion of silver into the base metal in the case of TiCuAg, and melting of the base metal in the case of the TiCuNi. Joints produced with a CuAu braze were satisfactory for the unirradiated state, but transmutation of Au to Hg affected the integrity of the joints irradiated in a below-core position where the transmutation rate per dpa was rather high. A CuAg braze yielded satisfactory joints in the unirradiated state and held up well when the irradiated specimens were tested. However, transmutation of Ag to Cd leads to a high residual radioactivity that may limit the usefulness of this braze after exposure to neutron irradiation.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• OSTI ID: 679531
• Report Number(s): CONF-960643--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BRAZED JOINTS
BRAZING ALLOYS
COPPER ALLOYS
PHYSICAL RADIATION EFFECTS
RADIOACTIVITY
TENSILE PROPERTIES
THERMONUCLEAR REACTOR MATERIALS
TRANSMUTATION