Abstract:
A new technology—laser shock processing (LSP) for improving the
mechanical properties of metals, especially fatigue life, is
presented. The mechanism of stress wave generated by laser
shocking is described, and the stress wave is measured with PVDF
transducer. A high-power density, neodymiumdescribed, and the
stress wave is measured with PVDF transducer. A high-power
density, neodymiumglass laser was used for shocking aluminum
alloy, the fatigue life of aluminum alloy was increased greatly.
With 95% confidence, the fatigue life of LSP specimens is 5.4 to
14.5 times longer than the unshocked specimens.
Key words: Laser
shock processing Stress wave Fatigue life PVDF transducer
*
This project
is supported by Education Department of Ministry of Machinery Industry.
Manuscript received on December 15, 1996; revised manuscript February
28, 1997
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