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Finite Element Modelling of Temperature Distribution in Friction Stir Welding Process and Its Influence on Distortion of Copper Canisters

Published online by Cambridge University Press:  17 March 2011

Therese Källgren ,
Lai-Zhe Jin  and
Rolf Sandström
Therese Källgren
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Brinellvägen 23, S-100 44 Stockholm, Sweden, (E-mail: theresek@kth.se)
Lai-Zhe Jin
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Brinellvägen 23, S-100 44 Stockholm, Sweden
Rolf Sandström
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Brinellvägen 23, S-100 44 Stockholm, Sweden
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Abstract

In an effort to enhance safety for long time disposal of waste nuclear fuel, friction stir welding has been developed as one alternative to seal copper canisters. To avoid the formation of voids and cracks during the welding process, an understanding of the heat and material flow andthereby the evolution of the microstructure, is of great importance. Finite element modelling has been used to simulate the heat and material flow as well as thermal expansion during the friction stir welding process. A model involving heat transfer, material flow, and continuum mechanics has been developed. The steady state solutions have been compared with experimental temperature observations as well as analytical solutions, showing good agreement. Temperature distribution is affected by the welding speed. For a given reference pointperpendicular to the welding direction, a lower welding speed corresponds to a higher peak temperature. The plunging position of welding tool influences the temperature distribution and therefore the displacement distribution of the weldment.

Keywords

friction stir weldingFSWcopperfinite element modelling
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 824: Symposium CC – Scientific Basis for Nuclear Waste Management XXVIII , 2004 , CC1.14
Copyright
Copyright © Materials Research Society 2004

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