TY - GEN
T1 - Fabrication and finite element analysis of micro dents using μ-laser shock peening
AU - Sealy, Michael P.
AU - Guo, Y. B.
AU - Horstemeyer, M. F.
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - Laser shock peening (LSP) is an innovative surface treatment developed to improve surface integrity. This study explores the feasibility using LSP to direct-write surface micro dents for lubricant retention. Since LSP is a highly transient process with a pulse duration of 10 - 100 ns, a real time in-situ measurement of laser/material interaction such as transient stresses/strains is challenging. Therefore, a 3D finite element simulation of micro-scale laser shock peening was developed to determine the effect of laser pulse duration and peak pressure on the transient material behaviors of titanium Ti-6A1-4V. The simulated dent geometry is similar to the measured dent geometry in terms of morphology. The results suggested there is an optimal peening time that produces the deepest dent. The maximum transient stress in peening direction occurred at a certain laser pulse time. However, the stress along the depth and radius were drastically affected by the peak pressures.
AB - Laser shock peening (LSP) is an innovative surface treatment developed to improve surface integrity. This study explores the feasibility using LSP to direct-write surface micro dents for lubricant retention. Since LSP is a highly transient process with a pulse duration of 10 - 100 ns, a real time in-situ measurement of laser/material interaction such as transient stresses/strains is challenging. Therefore, a 3D finite element simulation of micro-scale laser shock peening was developed to determine the effect of laser pulse duration and peak pressure on the transient material behaviors of titanium Ti-6A1-4V. The simulated dent geometry is similar to the measured dent geometry in terms of morphology. The results suggested there is an optimal peening time that produces the deepest dent. The maximum transient stress in peening direction occurred at a certain laser pulse time. However, the stress along the depth and radius were drastically affected by the peak pressures.
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U2 - 10.1115/MSEC_ICMP2008-72231
DO - 10.1115/MSEC_ICMP2008-72231
M3 - Conference contribution
AN - SCOPUS:77951279774
SN - 9780791848517
T3 - Proceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC2008
SP - 237
EP - 244
BT - Proceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC2008
T2 - ASME International Manufacturing Science and Engineering Conference, MSEC2008
Y2 - 7 October 2008 through 10 October 2008
ER -