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Tensile tests were carried out at different temperatures (ranging from 20 to 750 C) on a heat treatable Cu-0.6 wt% Cr-0.08 wt% Zr alloy of interest for use in nuclear fusion reactors as a primary heat sink material. The alloy shows good strength properties up to 500 C. Just above this temperature, a drop in the 0.2% yield strength, a reliable indicator of a softening process, occurs. A loss in ductility is observed at intermediate temperatures, with a minimum (elongation to rupture = 5.5%) at 550 C. This embrittlement, according to microstructural investigations (optical microscopy and scanning electron microscopy) on several deformed specimens, is due to an intergranular cracking process, which is typical of several copper alloys when hot deformed.

Additional information

Authors: PIATTI G, JRC Ispra (IT);BOERMAN D, JRC Ispra (IT)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 185 (1991) pp. 29-38
Record Number: 199111490 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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