Simulations of the effects of laser wavelength, pulse duration, and power density on plume pressure generation using a one-dimensional simulation code for laser shock processing

2021 ◽  
Vol 129 (23) ◽  
pp. 235108
Author(s):  
Manabu Heya ◽  
Hiroyuki Furukawa ◽  
Miho Tsuyama ◽  
Hitoshi Nakano
Keyword(s):  
Power Density ◽  
Pulse Duration ◽  
Laser Wavelength ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Simulation Code ◽  
One Dimensional ◽  
Dimensional Simulation ◽  
Shock Processing

Analysis the Dynamic Strain of AM60 Magnesium Alloy by Means of a Single Laser Shock Processing

2011 ◽  
Vol 314-316 ◽  
pp. 1876-1880
Author(s):  
Ai Xin Feng ◽  
Gui Feng Nie ◽  
Fen Shi ◽  
Chuan Chao Xu ◽  
Huai Yang Sun ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Magnesium Alloy ◽  
Dynamic Response ◽  
Dynamic Strain ◽  
Strain Gauges ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
One Dimensional ◽  
Spot Center ◽  
Shock Processing

In order to study the dynamic response of metal of laser shock processing, dynamic strain curves of AM60 Magnesium alloy during laser shock processing were measured by resistance strain gauges. Dynamic strain curves of three equiangular rosette near the shock spot and three strain gauges of different distances from the spot center were studied. The results indicated that the strain rate of AM60 Magnesium alloy decreased and plastic deformation increased with increasing impact times. And one dimensional strain hypothesis of laser shock processing was reasonable.

Research on the Theory of the Laser Shock Processing Technology

2014 ◽  
Vol 610 ◽  
pp. 1021-1028
Author(s):  
Jin Lan Lin ◽  
Jian Hong Fan
Keyword(s):  
Theoretical Model ◽  
Transmission Coefficient ◽  
Plasma Layer ◽  
Processing Technology ◽  
Laser Shock ◽  
Incident Laser ◽  
Laser Shock Processing ◽  
One Dimensional ◽  
Shock Processing ◽  
Maximum Transmission

In this paper the laser shock processing technology (LSPT) is investigated theoretically. A one-dimensional theoretical model is presented to express analytically the transmission coefficient of the incident laser beam through four different layers, i.e., the air layer, the constrained layer, the plasma layer, and the absorbing coating. Based on this model, the key parameters of LSPT can be further optimized to obtain the maximum transmission coefficient and the best surface-hardening effect. This one-dimensional theoretical model presented can be further used in guiding the parameter optimization for this technology.

Thickness effect in laser shock processing for test specimens with a small hole under smaller laser power density

2019 ◽  
Vol 114 ◽  
pp. 127-134 ◽  
Author(s):  
Yinfang Jiang ◽  
Xin Li ◽  
Wenfan Jiang ◽  
Quanhong Wan ◽  
Xuedong Gan ◽  
...  
Keyword(s):  
Power Density ◽  
Laser Power ◽  
Laser Power Density ◽  
Small Hole ◽  
Thickness Effect ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

The Research on the Action Modes of Laser Shock Wave Affected by Different Confinement Overlays

2011 ◽  
Vol 403-408 ◽  
pp. 2667-2670
Author(s):  
Yin Qun Hua ◽  
Rui Fang Chen ◽  
Yun Xia Ye ◽  
Hai Xia Liu
Keyword(s):  
Shock Wave ◽  
Stainless Steel ◽  
Pulse Duration ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Stainless Steel 304 ◽  
Action Modes ◽  
Laser Shock Wave ◽  
Shock Processing ◽  
Nd:Glass Laser

The liquid confinement medium (LCM) and the free confinement medium (FCM) made by ourselves were used as confinement overlays of laser shock processing (LSP) respectively, stainless steel 304 was shocked by Nd:Glass laser. The parameters of LSP are the wavelength of 1.06μm, the pulse duration of 20ns, and output energy of 35~40J. The laser was focused on a spot of Ф5mm. Firstly, the profiles of shocked regions of samples were measured by Taylor Hobson admeasuring apparatus, in which two different confinement mediums are used by LSP. Secondly, the ruinous behavior of the free confinement overlays induced by laser shock wave is observed and analyzed. Analyzed and compared with the experiments results, it is discovered that the effects of LSP are different with using different confinement mediums.

Laser shock processing with 20 MW laser pulses delivered by optical fibers

2000 ◽  
Vol 9 (3) ◽  
pp. 235-238 ◽  
Author(s):  
T. Schmidt-Uhlig ◽  
P. Karlitschek ◽  
M. Yoda ◽  
Y. Sano ◽  
G. Marowsky
Keyword(s):  
Optical Fibers ◽  
Laser Pulses ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Laser Shock Processing of Ni-Base Superalloy and High Cycle Fatigue Properties

2011 ◽  
Vol 697-698 ◽  
pp. 235-238 ◽  
Author(s):  
L. Zhou ◽  
Y.H. Li ◽  
W.F. He ◽  
X.D. Wang ◽  
Q.P. Li
Keyword(s):  
High Cycle Fatigue ◽  
Laser Pulses ◽  
Fatigue Properties ◽  
Treatment Technique ◽  
Cycle Fatigue ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
First Order ◽  
Shock Processing ◽  
Base Superalloy

A plasma sound wave detection method of laser shock processing (LSP) technology is proposed. Speciments of Ni-base superalloy are used in this paper. A convergent lens is used to deliver 1.2 J, 10 ns laser pulses by a Q-switch Nd:YAG laser, operating at 1 Hz. The influence of the laser density to the shock wave is investigated in detail for two different wavelength lasers. Constant amplitude fatigue data are generated in room environment using notch specimens tested at an amplitude of vibration 2.8 mm and first-order flextensional mode. The results show that LSP is an effective surface treatment technique for improving the high cycle fatigue performance of Ni-base superalloys having a factor of 1.62 improvement in fatigue life.

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