Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Tensile Behavior of Friction Stir Welded Al 6061-T651

마찰교반 용접된 Al 6061-T651 합금의 인장 특성

Im, Seong-Gon;Kim, Sang-Sik;Lee, Chang-Gil;Kim, Seong-Jun
임성곤;김상식;이창길;김성준

  • Published : 2004.01.15
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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 $Mg_2Si$ 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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References

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