scholarly journals Investigation of Surface Integrity on TC17 Titanium Alloy Treated by Square-spot Laser Shock Peening

2012 ◽  
Vol 25 (4) ◽  
pp. 650-656 ◽  
Author(s):  
Ziwen CAO ◽  
Haiying XU ◽  
Shikun ZOU ◽  
Zhigang CHE
Keyword(s):  
Titanium Alloy ◽  
Surface Integrity ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening ◽  
Square Spot

Characterization of TC17 Titanium Alloy Treated by Square-Spot Laser Shock Peening

2013 ◽  
Vol 652-654 ◽  
pp. 2378-2383 ◽  
Author(s):  
Zi Wen Cao ◽  
Shui Li Gong ◽  
Yu Gao
Keyword(s):  
Titanium Alloy ◽  
Fatigue Life ◽  
Residual Stresses ◽  
Stress Gradient ◽  
Laser Shock Peening ◽  
Fatigue Performance ◽  
Specimen Thickness ◽  
Laser Shock ◽  
Shock Peening ◽  
Square Spot

Laser shock peening (LSP) is widely known as a cold-worked surface treatment, and this technology has been to greatly improve the fatigue life of many metallic components. Our works focused on laser shock peening with Nd: glass laser system (pulse duration 30ns) and square laser spot size of 4mm×4mm for TC17 titanium alloy. Surface morphology, residual stresses and fatigue performance had been studied for TC17 alloy specimens and blades processed by LSP treatment. The results show that plastic strains in shocked dents become more homogeneous than ones produced by original circle spot with gaussian energy distribution. Surface residual stresses which measured using x-ray diffraction method showed different characteristic as varying specimen thickness, and LSP with overlapping ratio of 8% provided uniform residual stresses on peened surface. Low fluence peening which was implemented at borderline of peened surface was effective to diminish the stress gradient. Compared with mechanical shot peening, LSP attained smoother surface, lower microhardness and better fatigue performance. In a word, Square-spot LSP is an excellent way to improve fatigue life of titanium blade.

Effect of Laser Shock Peening on Surface Integrity of GH3039 Superalloys

2021 ◽  
Vol 58 (3) ◽  
pp. 0314001-314001202
Author(s):  
周文 Zhou Wen ◽  
葛茂忠 Ge Maozhong ◽  
王太明 Wang Taiming ◽  
项建云 Xiang Jianyun
Keyword(s):  
Surface Integrity ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening

Numerical Study on Fatigue Property of TC4 Titanium Alloy by Laser Shock Peening

Applied laser ◽  
2013 ◽  
Vol 33 (2) ◽  
pp. 131-138
Author(s):  
杨晶 Yang Jing ◽  
周建忠 Zhou Jianzhong ◽  
黄舒 Huang Shu ◽  
左立党 Zuo Lidang ◽  
季杏露 Ji Xinglu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Numerical Study ◽  
Fatigue Property ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Tc4 Titanium Alloy ◽  
Shock Peening

Cut-Off Value of Detail Fatigue Rated Strength of TC4 Titanium Alloy with Compound Strengthening Treatment by Laser Shock Peening and Shot Peening

2020 ◽  
Vol 47 (5) ◽  
pp. 0502006
Author(s):  
刘亚鹏 Liu Yapeng ◽  
史志俊 Shi Zhijun ◽  
赵一昭 Zhao Yizhao ◽  
朱亮 Zhu Liang ◽  
刘马宝 Liu Mabao
Keyword(s):  
Titanium Alloy ◽  
Shot Peening ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Tc4 Titanium Alloy ◽  
Shock Peening

Study on the abrasive wear behavior of laser shock peening Ti-6Al-4V titanium alloy under controlled cycling impact

Wear ◽  
2019 ◽  
Vol 426-427 ◽  
pp. 112-121 ◽  
Author(s):  
Yu Lin ◽  
Zhen-bing Cai ◽  
Zheng-yang Li ◽  
Mei-gui Yin ◽  
Wen-jian Wang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Abrasive Wear Behavior ◽  
Shock Peening

Laser shock peening induced fatigue crack retardation in Ti-17 titanium alloy

2018 ◽  
Vol 737 ◽  
pp. 94-104 ◽  
Author(s):  
Rujian Sun ◽  
Liuhe Li ◽  
Wei Guo ◽  
Peng Peng ◽  
Tongguang Zhai ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Crack ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening ◽  
Crack Retardation

Massive Parallel Laser Shock Peening: Simulation, Verification, and Analysis

2005 ◽  
Author(s):  
A. W. Warren ◽  
Y. B. Guo ◽  
S. C. Chen
Keyword(s):  
Residual Stress ◽  
Surface Integrity ◽  
Compressive Residual Stress ◽  
Laser Intensity ◽  
Shock Pressure ◽  
Laser Shock Peening ◽  
Massively Parallel ◽  
Laser Shock ◽  
Laser Material ◽  
Shock Peening

Laser shock peening (LSP) is a surface treatment process to improve the surface integrity of metallic components. The nearly pure mechanical process of LSP results in favorable surface integrity such as compressive residual stress and improved surface material properties. Since LSP is a transient process with laser pulse duration time on the order of 40 ns, real time in-situ measurement of laser/material interaction is very challenging, if not impossible. A fundamental understanding of laser/material interactions is essential for LSP planning. Previous finite element simulations of LSP have been limited to a single laser shock location for both two and three dimensional modeling. However, actual LSP are performed in a massively parallel mode which involves almost simultaneous multi-laser/material interactions in order to induce uniform compressive residual stress across the entire surface of the workpiece. The massively parallel laser/material interactions have a significant compound/interfering effect on the resulting surface integrity of the workpiece. The numerical simulation of shock pressure as a function of time and space during LSP is another critical problem. The purpose of this paper is to investigate the effects of parallel multiple laser/material interactions on the stress/strain distributions in the workpiece during LSP of AISI 52100 steel. FEA simulations of LSP in single and multiple passes were performed with the developed spatial and temporal shock pressure model via a subroutine. The simulated residual stresses agree with the measured data in nature and trend, while magnitude can be influenced by the interactions between neighboring peening zones and the locations of residual stress measurement. Design-of-experiment (DOE) based simulations of massive parallel LSP were also performed to determine the effects of laser intensity, laser spot size, and peening spacing on stresses and strains. Increasing the laser intensity increases both the stress magnitude and affected depth. The use of smaller laser spot sizes decreases the largest magnitude of residual stress and also decreases the depth affected by LSP. Larger spot sizes have less energy attenuation and cause more plastic deformation. Spacing between peening zones is critical for the uniformity of mechanical properties across the surface. The greatest uniformity and largest stress magnitudes are achieved by overlapping of the laser spots.

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