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Author(s): G. Banas, J. Chu, J.M. Rigsbee, F.V. Lawrence &
H.E. Elsayed-Ali
Abstract:
hock processing of low carbon steel
G.
Banas," J.
Chu," J.M.
Rigsbee," F.V.
Lawrence/
H.E.
Elsayed-Ali^
"University of Illinois at Urbana- Champaign, USA
& Laboratory for Laser Energetics, Rochester,
Fork,
ABSTRACT
The effect of laser shock processing (LSP) on the microstructure and
mechanical properties of the low carbon (0.04 wt % C) steel was studied.
LSP
was performed with a 1.054 ^m wavelength Ndrphosphate laser operating in a
pulse mode (600 ps duration and up to 200 J energy with a 3 mm diameter
beam) with power densities above 10* * W/cmA Shock waves were generated
by volume expansion of the plasma formed when the material was laser
irradiated.
Maximum shock wave intensities were obtained by not using a
plasma-confining overlay.
When an energy-absorbing black paint coating was
used, the specimen surface yielded LSP-induced deformation without melting.
The maximum pressure we were able to generate was approximately 2.5 GPa.
The rise-time was about ...
Pages: 14
Size: 1,859 kb
Paper DOI: 10.2495/SURF930161
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