scholarly journals The strengthening mechanism of laser shock processing and its application on the aero-engine components

2015 ◽  
Vol 45 (1) ◽  
pp. 1-8 ◽  
Author(s):  
LiuCheng ZHOU ◽  
WeiFeng HE ◽  
YingHong LI
Keyword(s):  
Strengthening Mechanism ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Aero Engine ◽  
Engine Components ◽  
Shock Processing

Micro-structural strengthening mechanism of multiple laser shock processing impacts on AISI 8620 steel

2011 ◽  
Vol 528 (19-20) ◽  
pp. 6128-6133 ◽  
Author(s):  
J.Z. Lu ◽  
J.W. Zhong ◽  
K.Y. Luo ◽  
L. Zhang ◽  
F.Z. Dai ◽  
...  
Keyword(s):  
Strengthening Mechanism ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

scholarly journals The strengthening mechanism of a nickel-based alloy after laser shock processing at high temperatures

2013 ◽  
Vol 14 (5) ◽  
pp. 055010 ◽  
Author(s):  
Yinghong Li ◽  
Liucheng Zhou ◽  
Weifeng He ◽  
Guangyu He ◽  
Xuede Wang ◽  
...  
Keyword(s):  
High Temperatures ◽  
Strengthening Mechanism ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Nickel Based Alloy ◽  
Shock Processing

Application of Laser Shock Processing to Improving the Fatigue Performance of Compressor Blade

2010 ◽  
Vol 135 ◽  
pp. 184-189
Author(s):  
Qi Peng Li ◽  
Ying Hong Li ◽  
Wei Feng He ◽  
Wei Li ◽  
Yu Qin Li
Keyword(s):  
Residual Stress ◽  
Compressive Residual Stress ◽  
Strengthening Mechanism ◽  
Compressor Blade ◽  
Fatigue Performance ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Vibration Strength ◽  
Vibration Fatigue ◽  
Shock Processing

The vibration strength under allowable value leads to the failure of compressor blade of certain aeroengine. In order to solve the problem, laser shock processing on blade was studied. First, the processed part of blade as well as the laser shock processing (LSP) parameters was established. Second, the influence of LSP and tumbling to the vibrate fatigue capability of blades were researched according to the application of the project. Third, the strengthening mechanism of LSP on improving the fatigue performance of the blade was studied. The results show that, LSP is consistently dependable and can prolong the vibration fatigue life of the blade efficiently. LSP can be placed after tumbling or directly replace it during the manufacturing of blade. The grain refinement, higher hardness and compressive residual stress are the three main reasons that enhance the fatigue capability of blade.

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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