Abstract
We address the effects of processing parameters on residual stresses and
fatigue properties of LY2 Al alloy by laser shock processing (LSP). Results show
that compressive residual stresses are generated near the surface of samples due to
LSP. The maximum compressive residual stress at the surface by two LSP impacts on
one side is higher than that by one LSP impact. The maximum value of tensile
residual stress is found at the mid-plane of samples subjected to two-sided LSP.
Compared with fatigue lives of samples treated by single-sided LSP, lives of those
treated by two-sided LSP are lower. However, these are higher than untreated ones.
© 2011 Chinese Optics Letters
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