Influence of Laser Shock Processing on Fatigue Properties of 6061-T6 Aluminum Alloy TIG Welded Joints

2015 ◽  
Vol 52 (6) ◽  
pp. 061403
Author(s):  
苏纯 Su Chun ◽  
周建忠 Zhou Jianzhong ◽  
黄舒 Huang Shu ◽  
孟宪凯 Meng Xiankai ◽  
佘杰 She Jie
Keyword(s):  
Aluminum Alloy ◽  
Welded Joints ◽  
Fatigue Properties ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Performance of Aluminum Alloy Welded Joints by Laser Shock Processing

2014 ◽  
Vol 41 (6) ◽  
pp. 0603007 ◽  
Author(s):  
徐国建 Xu Guojian ◽  
钟立明 Zhong Liming ◽  
王虹 Wang Hong ◽  
傅新皓 Fu Xinhao ◽  
王志一 Wang Zhiyi ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Welded Joints ◽  
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.

Effects of Sheet Thickness on Residual Stress Distribution by Laser Shock Processing of 7050-T7451 Aluminum Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 3778-3781
Author(s):  
Yin Fang Jiang ◽  
Lei Fang ◽  
Zhi Fei Li ◽  
Zhen Zhou Tang
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Stress Distribution ◽  
Residual Stresses ◽  
Sheet Thickness ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Element Analysis ◽  
Finite Element Software ◽  
Shock Processing

Laser shock processing is a technique similar to shot peening that imparts compressive residual stresses in materials for improved fatigue resistance. Finite element analysis techniques have been applied to predict the residual stresses from Laser shock processing. The purpose of this paper is to investigate of the different sheet thickness interactions on the stress distribution during the laser shock processing of 7050-T7451 aluminum alloy by using the finite element software. The results indicate that the sheet thickness has little effects on the compression stress in the depth of sheet, but great impacts on the reserve side.

Effects of Laser Shock Processing on Vibration Fatigue Properties of K417 Material

2009 ◽  
Vol 36 (8) ◽  
pp. 2197-2201 ◽  
Author(s):  
李伟 Li Wei ◽  
何卫锋 He Weifeng ◽  
李应红 Li Yinghong ◽  
汪诚 Wang Cheng ◽  
杨卓君 Yang Zhuojun
Keyword(s):  
Fatigue Properties ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Vibration Fatigue ◽  
Shock Processing

Micro-Structural Enhancement Mechanism of LY2 Aluminum Alloy by Means of a Single Laser Shock Processing

2010 ◽  
Vol 37 (10) ◽  
pp. 2662-2666 ◽  
Author(s):  
鲁金忠 Lu Jinzhong ◽  
罗开玉 Luo Kaiyu ◽  
冯爱新 Feng Aixin ◽  
钟俊伟 Zhong Junwei ◽  
孙桂芳 Sun Guifang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Enhancement Mechanism ◽  
Single Laser ◽  
Shock Processing

Effects of Laser Shock Processing on Tensile Properties of X80 Pipeline Steel Welded Joints

2011 ◽  
Vol 38 (11) ◽  
pp. 1103007
Author(s):  
孔德军 Kong Dejun ◽  
龙丹 Long Dan ◽  
吴永忠 Wu Yongzhong
Keyword(s):  
Tensile Properties ◽  
Welded Joints ◽  
Pipeline Steel ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
X80 Pipeline Steel ◽  
Shock Processing

Experimental Study of Residual Stress Formation Mechanism of 7050 Aluminum Alloy Sheet by Laser Shock Processing

2016 ◽  
Vol 43 (7) ◽  
pp. 0702008
Author(s):  
曹宇鹏 Cao Yupeng ◽  
徐影 Xu Ying ◽  
冯爱新 Feng Aixin ◽  
花国然 Hua Guoran ◽  
周东呈 Zhou Dongcheng ◽  
...  
Keyword(s):  
Residual Stress ◽  
Experimental Study ◽  
Aluminum Alloy ◽  
Alloy Sheet ◽  
Laser Shock ◽  
Aluminum Alloy Sheet ◽  
Laser Shock Processing ◽  
7050 Aluminum Alloy ◽  
Stress Formation ◽  
Shock Processing

Investigated on Fatigue Properties of Aluminum Ally 7050T7451 with Fastener Holes by Laser Shock Processing

2012 ◽  
Vol 460 ◽  
pp. 407-410
Author(s):  
Yin Fang Jiang ◽  
Xian Cong He ◽  
Yu Huang ◽  
Jian Wen Zhang ◽  
Zhi Fei Li
Keyword(s):  
Fatigue Life ◽  
Fatigue Properties ◽  
Hole Drilling ◽  
Mean Stress ◽  
Strengthening Effect ◽  
Laser Shock ◽  
Residual Stress Field ◽  
Laser Shock Processing ◽  
The Mean ◽  
Shock Processing

Based on the FEM code ABAQUS and MSC.Fatigue, the process of LSP before hole-drilling was adopted to study the residual stress field of aluminum alloy7050T7451 with Fastener Holes after Laser shock processing (LSP), and the fatigue life of the specimens by LSP was analyzed in this paper. The results indicate that multiple laser shock processing can improve the residual compressive stress and fatigue life to a certain degree, and with the increasing number of shot, the strengthening effect gradually decreases. The ratio of the fatigue life of specimens treated by LSP to the fatigue life of untreated specimens is gradually decreased as the mean stress σm increases, and when the σm is 67.3MPa, the fatigue life of specimens treated by LSP advances 719%, compared with that of untreated specimens.

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