Effect of laser shock peening on bending fatigue performance of AISI 9310 steel spur gear

2017 ◽  
Vol 94 ◽  
pp. 15-24 ◽  
Author(s):  
Chong Peng ◽  
Yuzhe Xiao ◽  
Yanzhong Wang ◽  
Wei Guo
Keyword(s):  
Spur Gear ◽  
Laser Shock Peening ◽  
Fatigue Performance ◽  
Laser Shock ◽  
Bending Fatigue ◽  
Shock Peening

Laser Shock Peening on a 6056-T4 Aluminium Alloy for Airframe Applications

2014 ◽  
Vol 891-892 ◽  
pp. 974-979 ◽  
Author(s):  
Daniel Glaser ◽  
Claudia Polese ◽  
Rachana D. Bedekar ◽  
Jasper Plaisier ◽  
Sisa Pityana ◽  
...  
Keyword(s):  
Residual Stress ◽  
Laser Pulse ◽  
Fatigue Tests ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
X Ray Diffraction ◽  
Bending Fatigue ◽  
Pulse Density ◽  
Shock Peening ◽  
Compressive Residual Stresses

Laser Shock Peening (LSP) is a material enhancement process used to introduce compressive residual stresses in metallic components. This investigation explored the effects of different combinations of LSP parameters, such as irradiance (GW/cm2) and laser pulse density (spots/mm2), on 3.2 mm thick AA6056-T4 samples, for integral airframe applications. The most significant effects that are introduced by LSP without a protective coating include residual stress and surface roughness, since each laser pulse vaporizes the surface layer of the target. Each of these effects was quantified, whereby residual stress analysis was performed using X-ray diffraction with synchrotron radiation. A series of fully reversed bending fatigue tests was conducted, in order to evaluate fatigue performance enhancements with the aim of identifying LSP parameter influence. Improvement in fatigue life was demonstrated, and failure of samples at the boundary of the LSP treatment was attributed to a balancing tensile residual stress.

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.

Experimental Study on Improving High-Cycle Fatigue Performance of TC11 Titanium alloy by Laser Shock Peening

2013 ◽  
Vol 40 (8) ◽  
pp. 0803006 ◽  
Author(s):  
聂祥樊 Nie Xiangfan ◽  
何卫锋 He Weifeng ◽  
臧顺来 Zang Shunlai ◽  
王学德 Wang Xuede ◽  
李玉琴 Li Yuqin
Keyword(s):  
Experimental Study ◽  
Titanium Alloy ◽  
High Cycle Fatigue ◽  
Laser Shock Peening ◽  
Fatigue Performance ◽  
Cycle Fatigue ◽  
Laser Shock ◽  
Shock Peening ◽  
Tc11 Titanium Alloy

scholarly journals Effects of ablative and non-ablative laser shock peening on AA7075-T651 corrosion and fatigue performance

2021 ◽  
pp. 1-20
Author(s):  
A. G. Sanchez ◽  
M. Leering ◽  
D. Glaser ◽  
D. Furfari ◽  
M. E. Fitzpatrick ◽  
...  
Keyword(s):  
Laser Shock Peening ◽  
Fatigue Performance ◽  
Laser Shock ◽  
Shock Peening ◽  
Ablative Laser
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