Numerical simulation of laser preheating of friction stir welding of dissimilar metals

Friction stir welding, FSW, of harder metal alloys is difficult to perform, like here dissimilar welding of titanium alloy to stainless steel in butt joint configuration. One major limitation is tool wear which can be reduced by preheating with a laser beam. A mathematical model to calculate the too...

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Bibliographic Details
Published inScience and technology of welding and joining Vol. 23; no. 4; pp. 351 - 356
Main Authors Sundqvist, Jesper, Kim, Kyoung-Hak, Bang, Hee-Seon, Bang, Han-Sur, Kaplan, Alexander F. H.
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 19.05.2018
SAGE Publications
Subjects
dissimilar metals
Friction stir welding
laser beam
Manufacturing Systems Engineering
Produktionsutveckling
tool force
wear
tool force
wear
dissimilar metals
laser beam
Friction stir welding
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Summary:Friction stir welding, FSW, of harder metal alloys is difficult to perform, like here dissimilar welding of titanium alloy to stainless steel in butt joint configuration. One major limitation is tool wear which can be reduced by preheating with a laser beam. A mathematical model to calculate the tool forces during FSW was developed further. The calculations show that the laser beam reduces forces at the pin and shoulder of the FSW-tool, accompanied by reduced heat generation through the tool. Within its operating limits, the process has low sensitivity on the lateral position of the leading laser beam. The model supports the understanding and optimisation of the complex interaction zone of forces and heat around the FSW-tool.
ISSN:1362-1718
1743-2936
1743-2936
DOI:10.1080/13621718.2017.1391936