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Modelling of creep in friction stir welded copper
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Technology.ORCID iD: 0000-0002-8494-3983
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Technology.
2013 (English)In: Materials research innovations (Print), ISSN 1432-8917, E-ISSN 1433-075X, Vol. 17, no 5, 350-354 p.Article in journal (Refereed) Published
Abstract [en]

Copper canisters for storage of nuclear waste will be exposed to creep. The canisters will be closed with friction stir welding (FSW). To describe the creep behaviour of the welds, uniaxial creep tests have been performed. A previously developed fundamental creep model for parent metal is applied to the different weld zones. The differences in microstructure and yield strength between the weld zones are taken into account. Creep strain versus time curves for the weld zones have successfully been predicted without the use of any adjustable parameters. It should be noted that the temperature range of interest of 50-100 degrees C is deep down in the power law break down regime with Norton exponents between 25 and 100. The constitutive equations are used in FEM computations of creep in the canister weldments.

Place, publisher, year, edition, pages
2013. Vol. 17, no 5, 350-354 p.
Keyword [en]
Copper, Creep, Weldment
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-127467DOI: 10.1179/1433075X13Y.0000000121ISI: 000322787400011Scopus ID: 2-s2.0-84923183362OAI: oai:DiVA.org:kth-127467DiVA: diva2:645736
Note

QC 20130905

Available from: 2013-09-05 Created: 2013-08-30 Last updated: 2017-12-06Bibliographically approved

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Sandström, Rolf

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