Abstract
Copper alloys tubes are assumed to be used for the heat sink system of the ITER first wall and divertor. To join copper tubes with type 316LN stainless steel tubes (for the collector system) various methods are provided, the most promising being the friction welding. Specimens of joints and the base materials were irradiated in the SM-2 mixed spectrum reactor to a dose of 0.2 dpa at T irr=150°C and 300°C. Specimens of GlidCop Al25/316LN friction welded joints have a relatively high level of strength properties and a rather low plasticity after irradiation.
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