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Title: Effect of heat treatments on the tensile and electrical properties of high-strength, high-conductivity copper alloys

The unirradiated tensile properties of CuCrZr produced by two different vendors have been measured following different heat treatments. Room temperature electrical resistivity measurements were also performed in order to estimate the thermal conductivity of these specimens. The thermomechanical conditions studied included solution quenched, solution quenched and aged (ITER reference heat treatment), simulated slow HIP thermal cycle ({approximately}1{degrees}C/min cooling from solutionizing temperature) and simulated fast HIP thermal cycle ({approximately}100{degrees}C/min cooling from solutionizing temperature). Specimens from the last two heat treatments were tested in both the solution-cooled condition and after subsequent precipitate aging at 475{degrees}C for 2 h. Both of the simulated HIP thermal cycles caused a pronounced decreases in the strength and electrical conductivity of CuCrZr. The tensile and electrical properties were unchanged by subsequent aging in the slow HIP thermal cycles caused a pronounced decrease in the strength and electrical conductivity of CuCrZr. The tensile and electrical properties were unchanged by subsequent aging in the slow HIP thermal cycle specimens, whereas the strength and conductivity following aging in the fast HIP thermal cycle improved to {approximately}65% of the solution quenched and aged CuCrZr values. Limited tensile and electrical resistivity measurements were also made on two new heats of Hycon 3HPmore » CuNiBe. High strength but poor uniform and total elongations were observed at 500{degrees}C on one of these new heats of CuNiBe, similar to that observed in other heats.« less
Authors:
;  [1]
  1. Oak Ridge National Lab., TN (United States)
Publication Date:
OSTI Identifier:
543210
Report Number(s):
DOE/ER--0313/22
ON: DE97008797; TRN: 97:020250
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Aug 1997; Related Information: Is Part Of Fusion materials semiannual progress report for period ending June 30, 1997; PB: 358 p.
Research Org:
Oak Ridge National Lab., TN (United States)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; 36 MATERIALS SCIENCE; COPPER BASE ALLOYS; TENSILE PROPERTIES; ELECTRIC CONDUCTIVITY; TEMPERATURE DEPENDENCE; PROGRESS REPORT; THERMONUCLEAR REACTOR MATERIALS; BERYLLIUM ALLOYS; FIRST WALL; NICKEL ALLOYS; DIVERTORS; CHROMIUM ALLOYS; ZIRCONIUM ALLOYS; ITER TOKAMAK