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Friction stir welding is a solid state, environment friendly and energy efficient welding process for joining many engineering alloys including magnesium alloys. In this study, the effect of different cooling rates on microstructural and mechanical properties of friction stir welded AZ91C magnesium alloy was investigated. AZ91C magnesium samples were friction stir welded in air as well as in water. The effects of submerging environment on tensile and hardness properties of samples were discussed. The results showed that water, as a welding environment, has a considerable impact on the mechanical properties of the weld.
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Rouhi et al. (2015) studied this question.
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