Microstructure and hot corrosion behavior of the Ni-based superalloy GH202 treated by laser shock processing

2017 ◽  
Vol 125 ◽  
pp. 67-75 ◽  
Author(s):  
Jiangdong Cao ◽  
Junsong Zhang ◽  
Yinqun Hua ◽  
Ruifang Chen ◽  
Zhibao Li ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Hot corrosion behavior of TC11 titanium alloy treated by laser shock processing

2013 ◽  
Vol 283 ◽  
pp. 775-780 ◽  
Author(s):  
Yinqun Hua ◽  
Yuchuan Bai ◽  
Yunxia Ye ◽  
Qing Xue ◽  
Haixia Liu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Tc11 Titanium Alloy ◽  
Shock Processing

Effect of Laser Shock Processing on Electrochemical Corrosion Behavior of 7075 Aluminum Alloy Plasma Arc Weldments

2015 ◽  
Vol 42 (12) ◽  
pp. 1203006
Author(s):  
王江涛 Wang Jiangtao ◽  
张永康 Zhang Yongkang ◽  
陈菊芳 Chen Jufang ◽  
周金宇 Zhou Jinyu ◽  
卢雅琳 Lu Yalin ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Electrochemical Corrosion ◽  
7075 Aluminum Alloy ◽  
Plasma Arc ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Electrochemical Corrosion Behavior ◽  
Shock Processing

On Laser Shock Processing to Improve Hot Corrosion Resistance of In718 Superalloy

2014 ◽  
Vol 989-994 ◽  
pp. 27-30
Author(s):  
Yu Chuan Bai ◽  
Yin Qun Hua ◽  
Zhen Rong ◽  
Qing Xue ◽  
Rui Fang Chen
Keyword(s):  
Residual Stress ◽  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Corrosion Test ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Stress Surface ◽  
In718 Superalloy ◽  
Average Corrosion Rate ◽  
Shock Processing

The aim of this research is to improve the hot corrosion resistance of In718 superalloy by laser shock processing. Specimens were treated by laser shock processing on the whole surface. The hot corrosion resistance beneath molten Na2SO4 under 900 °C was investigated. The effects of laser shock processing impacts on residual stress, surface microstructure and microstructure after hot corrosion test were investigated. Results show that 3 times laser shock processing can induce-400 MPa compressive residual stress. The microstructure was characterized by highly tangled and dense dislocations and a large number of twins. The average corrosion rate of In718 superalloy treated by laser shock processing is about 50 % lower than that of the untreated superalloy.

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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