Abstract
Large compressive residual stress is induced on the aluminum 6,061 sheets by application of typical processing named SMAT (Surface Mechanical Attrition Treatment). The incremental hole-drilling method is applied to assess the thickness-through distribution of residual stress associated with traditional rosette strain gauges and non contact optical method. The results obtained by these two technologies exhibit good agreement, which verifies the reliability of the optical setup. On the other hand, the effect of induced topography on the surface of aluminum sheets is discussed to collate the initial position of drilling process.
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