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A new distributed cooling method for mitigating residual stress in friction stir welding

Xingguo Zhou,Donald Mackenzie,Wenke Pan

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE（2016）

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Abstract
An analytical and finite element investigation of the effect of different cryogenic cooling nozzle configurations on temperature and residual stress in a model friction stir weld is presented. A new configuration adopting a distributed cooling approach is proposed based on an analytical cooling model. Finite element models are implemented to verify the effect of distributed cooling on welding temperature and longitudinal residual stress. The results presented indicate that new active cooling methods can improve mitigation of welding-induced residual stress.
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Key words
Distributed cooling,active cooling,residual stress,friction stir welding,finite element analysis
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