Grain refinement of LY2 aluminum alloy induced by ultra-high plastic strain during multiple laser shock processing impacts

2010 ◽  
Vol 58 (11) ◽  
pp. 3984-3994 ◽  
Author(s):  
J.Z. Lu ◽  
K.Y. Luo ◽  
Y.K. Zhang ◽  
C.Y. Cui ◽  
G.F. Sun ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Plastic Strain ◽  
Grain Refinement ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
High Plastic Strain ◽  
Shock Processing ◽  
High Plastic

The Microstructure and Properties of LY12 Aluminum Alloy by Ultra-High Plastic Strain

2011 ◽  
Vol 464 ◽  
pp. 708-711
Author(s):  
Ling Feng Zhang ◽  
Kai Yu Luo ◽  
J.Z. Lu ◽  
Y. Xiong ◽  
Y.Z. Wang
Keyword(s):  
Electron Microscopy ◽  
Aluminum Alloy ◽  
Plastic Strain ◽  
Surface Hardness ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Plastic Deformation Behavior ◽  
High Plastic Strain ◽  
Shock Processing ◽  
High Plastic

The ultra-high plastic deformation behavior by laser shock processing on the LY12 aluminum alloy had been investigated. The morphology of the materials had been analyzed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). It was found that the grain refinement layer was formed in the thickness of about 100μm .The dislocation density of LY12 aluminum alloy should be large increased after laser shocking because the accumulation of dislocation was appeared on the grain boundary. With the laser energy density increased there formed subgrain structure and eventually generate ultra-fine grain. Hardness test results also show that the surface hardness obtains a big growth about 60% after laser shock processing. The results showed that the formation of ultra-high plastic strain can improve the surface hardness of LY12 aluminum alloy, and thus effectively improve the comprehensive mechanical properties.

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.

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

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

Elastic properties modification in aluminum alloy induced by laser-shock processing

2001 ◽  
Vol 297 (1-2) ◽  
pp. 138-143 ◽  
Author(s):  
Y.K Zhang ◽  
X.R Zhang ◽  
X.D Wang ◽  
S.Y Zhang ◽  
C.Y Gao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Elastic Properties ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing
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