Characterization of copper-beryllium alloy C17510

摘要

The BPX (Burning Plasma Experiment) toroidal field coil conductor is fabricated from plates of C17510, a copper-beryllium alloy. Results of tensile characterizations of this alloy at room temperature and liquid nitrogen (IN/sub 2/) are presented with room temperature fatigue results at R=0.05. The R=0.05 characterization data represent the constraint on the design curve of stress amplitude versus cycles-to-failure. Data are also presented from precision, four-wire electrical conductivity measurements. These measurements include samples of material extracted from key process steps of the C17510 manufacture and span the temperature range of IN/sub 2/ to 300 K in increments of 25 K. The grain structure of the material is also reported for key process steps and material orientations. The directionality of key properties is discussed.