Softening of Material During Friction Stir Welding of Aluminum Alloy 2219-T81

Keywords

aluminum alloy, friction stir welding, softening, residual stresses, mathematical modeling, experimental measurement

Abstract

When friction stir welding high-strength aluminum alloy 2219-T81, a material softening effect was observed. The presence of a softening zone was confirmed by hardness measurements and mechanical testing of samples of the base material and welded joints. A model of material softening from the maximum heating temperature during welding was proposed, which is advisable to use in mathematical modeling of residual welding stresses. Not taking into account the softening effect leads to an increase in residual stresses by 30%.

References

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