Study on Very-High-Cycle-Fatigue Property of Aero-Engine Blades Based on Subcomponent Specimen

The cyclic load number of aero-engine blade during its service life is very likely beyond 107, which is regarded as the conventional fatigue limit. Moreover, surface strengthening is very often used in the manufacturing process of blade. The conventional testing method in the VHCF regime cannot exactly reflect the stress state of the blade, including the mechanism of crack initiation. To study the fatigue behavior and effects of laser shock peening, a kind of bending fatigue subcomponent specimen was designed and the laser shock peening model was established. Experiment about TC17 was accomplished by the Ulra-High Cycle bending fatigue system. It is found that the fatigue damage occurs beneath the surface and the S-N curve is continuously rather than multi-step declining in the VHCF regime. Process of surface strengthening has a significant effect on fatigue performance of TC17 titanium alloy.

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Laser Shock Peening of SiCp/2009Al Composites: Microstructural Evolution, Residual Stress and Fatigue Behavior

Materials ◽

10.3390/ma14051082 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1082

Author(s):

Rujian Sun ◽

Ziwen Cao ◽

Yongxin Zhang ◽

Hepeng Zhang ◽

Yingwei Yu ◽

...

Keyword(s):

Residual Stress ◽

Fatigue Behavior ◽

Base Material ◽

Laser Shock Peening ◽

Laser Shock ◽

Bending Fatigue ◽

Three Point Bending ◽

Modification Technique ◽

Shock Peening ◽

Sic Particle

SiC particle reinforced aluminum alloy has a wide application in the aerospace industries. In this study, laser shock peening (LSP), an advanced surface modification technique, was employed for SiCp/2009Al composite to reveal its microstructure, microhardness and residual stress evolution. After peening, high densities of dislocations were induced in the aluminum substrate, and stacking faults were introduced into the SiC particle. The microhardness was increased from 155–170 HV to 170–185 HV, with an affected depth of more than 1.5 mm. Compressive residual stresses of more than 200 MPa were introduced. The three-point bending fatigue of the base material, laser peened and milled after laser peened specimens with artificial crack notch fabricated by a femtosecond laser was investigated. The average fatigue lives of laser peened and milled after laser peened specimens were increased by up to 10.60 and 2.66 times, compared with the base material. This combined fundamental and application-based research seeks to comprehensively explore the applicability of LSP on metal matrix composite.

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

Applied laser ◽

10.3788/al20133302.0131 ◽

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

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Effects of Laser Shock Peening and Ultrasonic Shot Peening on Fatigue Property of 1Cr11Ni2W2MoV Stainless Steel

Laser & Optoelectronics Progress ◽

10.3788/lop50.051403 ◽

2013 ◽

Vol 50 (5) ◽

pp. 051403 ◽

Cited By ~ 2

Author(s):

赖志林 Lai Zhilin ◽

汪诚 Wang Cheng ◽

李应红 Li Yinghong ◽

周留成 Zhou Liucheng ◽

何卫锋 He Weifeng ◽

...

Keyword(s):

Stainless Steel ◽

Shot Peening ◽

Fatigue Property ◽

Laser Shock Peening ◽

Laser Shock ◽

Ultrasonic Shot Peening ◽

Shock Peening

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The Cyclic Fatigue Behavior for 6061-T6 Al Alloy Shafts Processed by Laser Shock Peening

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1002.21 ◽

2020 ◽

Vol 1002 ◽

pp. 21-32

Author(s):

Ahmed R. Alhamaoy ◽

Ghanim Sh. Sadiq ◽

Furat I. Hussein ◽

S.N. Ali

Keyword(s):

Pulse Energy ◽

Fatigue Behavior ◽

High Stress ◽

Weight Ratio ◽

Cyclic Fatigue ◽

Laser Shock Peening ◽

Al Alloy ◽

Laser Shock ◽

Noticeable Effect ◽

Shock Peening

The optimal combination of aluminum quality, sufficient strength, high stress to weight ratio and clean finish make it a good choice in driveshafts fabrication. This study has been devoted to experimentally investigate the effect of applying laser shock peening (LSP) on the fatigue performance for 6061-T6 aluminum alloy rotary shafts. Q-switched pulsed Nd:YAG laser was used with operating parameters of 500 mJ and 600 mJ pulse energies, 12 ns pulse duration and 10 Hz pulse repetition rate. The LSP is applied at the waist of the prepared samples for the cyclic fatigue test. The results show that applying 500 mJ pulse energy yields a noticeable effect on enhancing the fatigue strength by increasing the required number of cycles to fracture the sample. In addition, the effect on increasing the pulse energy from 500 mJ to 600 mJ shows a significant effect in term of creating the endurance limit for the samples.

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Effect of laser shock peening on residual stress, microstructure and fatigue behavior of ATI 718Plus alloy

International Journal of Fatigue ◽

10.1016/j.ijfatigue.2017.04.016 ◽

2017 ◽

Vol 102 ◽

pp. 121-134 ◽

Cited By ~ 53

Author(s):

Micheal Kattoura ◽

Seetha Ramaiah Mannava ◽

Dong Qian ◽

Vijay K. Vasudevan

Keyword(s):

Residual Stress ◽

Fatigue Behavior ◽

Laser Shock Peening ◽

Laser Shock ◽

Shock Peening

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Influence of specimen thickness on the fatigue behavior of notched steel plates subjected to laser shock peening

Optics & Laser Technology ◽

10.1016/j.optlastec.2017.12.011 ◽

2018 ◽

Vol 101 ◽

pp. 531-544 ◽

Cited By ~ 15

Author(s):

V. Granados-Alejo ◽

C. Rubio-González ◽

C.A. Vázquez-Jiménez ◽

J.A. Banderas ◽

G. Gómez-Rosas

Keyword(s):

Fatigue Behavior ◽

Laser Shock Peening ◽

Steel Plates ◽

Specimen Thickness ◽

Laser Shock ◽

Shock Peening

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.891-892.974 ◽

2014 ◽

Vol 891-892 ◽

pp. 974-979 ◽

Cited By ~ 4

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.

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

Optics & Laser Technology ◽

10.1016/j.optlastec.2017.03.017 ◽

2017 ◽

Vol 94 ◽

pp. 15-24 ◽

Cited By ~ 7

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

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Alternative Mechanical Surface Treatments for Fatigue Strength Enhancement

Materials Science Forum ◽

10.4028/www.scientific.net/msf.490-491.328 ◽

2005 ◽

Vol 490-491 ◽

pp. 328-333 ◽

Cited By ~ 5

Author(s):

I. Altenberger

Keyword(s):

Residual Stress ◽

High Temperature ◽

Strain Aging ◽

Fatigue Behavior ◽

Laser Shock Peening ◽

Dynamic Strain ◽

Laser Shock ◽

Deep Rolling ◽

Shock Peening ◽

Mechanical Surface

In this paper, The effects of laser-shock peening and high temperature deep rolling on nearsurface microstructures, residual stress states and fatigue behavior of various metallic materials are investigated and discussed. Similar to warm peening (shot peening at elevated temperatures), high temperature deep rolling may induce several favourable effects, especially in ferritic steels, where dynamic strain aging by carbon atoms can be exploited as a major strengthening mechanism. But also in materials without ‚classical‘ strain aging high temperature deep rolling is effective in improving the fatigue behaviour by inducing favourable, e.g. precipitation-hardened, nearsurface microstructures. As a consequence, these modified near-surface microstructures directly alter the thermal and mechanical relaxation behaviour of residual stresses. Laser-shock peening is already used in the aircraft industry (as a mechanical surface treatment for fan-blades) and owes its benefial effects to deep layers of compressive residual stress and work hardening and a relatively smooth surface roughness. Characteristic examples of microstructures and residual stress profiles as generated by laser-shock peening are presented. Moreover, the impact on the fatigue behavior of steels and a titanium alloy is outlined and discussed.

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