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

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.

Laser shock peening on fatigue behavior of 2024-T3 Al alloy with fastener holes and stopholes

2001 ◽  
Vol 298 (1-2) ◽  
pp. 296-299 ◽  
Author(s):  
J.-M. Yang ◽  
Y.C. Her ◽  
Nanlin Han ◽  
Alan Clauer
Keyword(s):  
Fatigue Behavior ◽  
Laser Shock Peening ◽  
Al Alloy ◽  
Laser Shock ◽  
Shock Peening

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

2017 ◽  
Vol 102 ◽  
pp. 121-134 ◽  
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

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

2018 ◽  
Vol 101 ◽  
pp. 531-544 ◽  
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

Alternative Mechanical Surface Treatments for Fatigue Strength Enhancement

2005 ◽  
Vol 490-491 ◽  
pp. 328-333 ◽  
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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