| Abstract |
| Tensile behavior of friction stir welded Al6061-T651 alloy plate joined with different tool rotating and welding speeds was examined in the present study. Within the range of processing parameters where the welding defects were not observed, the tensile elongation of friction stir welded Al6061-T651 alloy plate was greatly improved with increasing welding speed and/or decreasing rotating speed. The change in the strength level was, however, marginal. For those specimens with low tensile elongation values, clusters of coarse Mg2Si precipitates were often observed in the vicinity of fractured area. Severe plastic flow occurred during friction stir welding, particularly for the specimens joined with low welding speed, appeared to be responsible for the clustering and eventually lower the tensile elongation. |
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| Key Words |
| Friction stir welding, Al 6061-T651, Tensile behavior |
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