EFFECT OF WELDING PARAMETERS ON MIXTURE OF MATERIALS IN NUGGET ZONE IN FRICTION STIR WELDS

Acta Metall Sin

2007, Vol. 43

Issue (3): 321-326 DOI:

Research Articles

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EFFECT OF WELDING PARAMETERS ON MIXTURE OF MATERIALS IN NUGGET ZONE IN FRICTION STIR WELDS

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. EFFECT OF WELDING PARAMETERS ON MIXTURE OF MATERIALS IN NUGGET ZONE IN FRICTION STIR WELDS. Acta Metall Sin, 2007, 43(3): 321-326 .

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Abstract Rate dependent constitutive model is used to simulate the friction stir welding process. The effect of the process parameters on the material deformation on the transverse section of the friction stir weld is investigated. The mixture of the materials on the both sides of the welding line in the nugget zone and thermo-mechanical zone is studied by means of the research on the equivalent plastic strain distributions under different process parameters. The effect of the process parameters on the weld quality is herein judged from the material deformations. Results indicate that mixture of the material can be improved when the angular velocity of the pin is increased or the welding speed is decreased. But flaws may occur when the angular velocity is too high.

Key words: friction stir welding finite element method weld quality

Received: 21 June 2006

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