Papers by Author: Anthony P. Reynolds

Abstract: A detailed examination of the texture evolution occurring within a friction stir weld inAA2195 reveals features that are not consistent with current models of material ow in frictionstir welds. While the deposited weld is dominated by a B ideal shear texture component, thistexture periodically alternates with a B texture, indicating a reversal in the sense of the sheardeformation. In addition, the observed rotation of the orientation of these shear textures, andtheir replacement by a distinct, new shear texture orientation to correct for the misorientationthat develops, reveals a heretofore unobserved characteristic of friction stir welds that providesfurther details about material ow during friction stir welding.

Abstract: Friction stir welding (FSW) has been in use for nearly fifteen years and a significant body of published research regarding process/property/structure relationships is now available; particularly with respect to FSW of aluminum alloys. In this paper, some pertinent literature will be reviewed and an attempt made to tie the numerous experimental observations together through some unifying concepts. Examination of relationships among control and response FSW process variables (respectively e.g. tool rotation rate and torque) and weld microstructure and properties can provide important insight regarding how weld properties develop and how best to approach process development for different alloy classes.