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FSW to seal 50mm thick copper canisters - a weld that lasts for 100,000 years

5th International Symposium
September 2004

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A method investigated by Sweden for storage of nuclear waste in copper canisters sealed using friction stir welding (where EB welding has been used before) is described. Topics include: Nimonic 105 and Densimet sintered tungsten alloy tool; welding machine; joint preparation for the lid to canister joint; use of a pilot hole; welding procedure; and measurement of the welding temperature. Experience with weld quality is discussed, with reference to results of radiography, ultrasonic testing, eddy current inspection and tensile testing.

5th International Symposium, 14-16 Sep 2004, Session 5B: Copper Alloys/Magnesium Alloys, Paper 01

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