Improving fatigue performance of laser-welded 2024-T3 aluminum alloy using dry laser peening

2021 ◽  
Author(s):  
Tomokazu Sano
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Performance ◽  
Laser Peening

Fatigue Performance of Laser Peened 7050-T7451 Aluminum Alloy

2006 ◽  
Author(s):  
Adrian T. DeWald ◽  
Harold Luong ◽  
John E. VanDalen ◽  
Michael R. Hill
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Fatigue Testing ◽  
Fatigue Performance ◽  
Laser Peening ◽  
Metallic Materials ◽  
Stress Distributions ◽  
Life Data ◽  
Slitting Method ◽  
Life Improvement

Laser peening is an emerging technology for the surface treatment of metallic materials that is capable of enhancing resistance to fatigue failure. This paper presents results quantifying the effects of laser peening on residual stress and fatigue performance of samples machined from 7050-T7451 aluminum alloy. Residual stress distributions were measured for treatment with different laser peening parameter sets using the slitting method. For particular laser peening parameter sets, stress versus life data were generated over a range of applied loads and compared with as-machined and shot peened results. Two different sample types were used for fatigue testing: smooth bend bars and notched bend bars. In general, laser peening produced a fatigue life improvement of approximately 3 to 6 relative to as machined samples and 1.5 to 2 relative to shot peened samples over the range of stress levels tested.

scholarly journals Improving Fatigue Performance of Laser-Welded 2024-T3 Aluminum Alloy Using Dry Laser Peening

Metals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1192 ◽  
Author(s):  
Sano ◽  
Eimura ◽  
Hirose ◽  
Kawahito ◽  
Katayama ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Weld Metal ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fatigue Performance ◽  
Laser Peening ◽  
Residual Tensile Stress ◽  
Atmospheric Conditions ◽  
2024 Aluminum Alloy ◽  
Welding Defects

The purpose of the present study was to verify the effectiveness of dry laser peening (DryLP), which is the peening technique without a sacrificial overlay under atmospheric conditions using femtosecond laser pulses on the mechanical properties such as hardness, residual stress, and fatigue performance of laser-welded 2024 aluminum alloy containing welding defects such as undercuts and blowholes. After DryLP treatment of the laser-welded 2024 aluminum alloy, the softened weld metal recovered to the original hardness of base metal, while residual tensile stress in the weld metal and heat-affected zone changed to compressive stresses. As a result, DryLP treatment improved the fatigue performances of welded specimens with and without the weld reinforcement almost equally. The fatigue life almost doubled at a stress amplitude of 180 MPa and increased by a factor of more than 50 at 120 MPa. DryLP was found to be more effective for improving the fatigue performance of laser-welded aluminum specimens with welding defects at lower stress amplitudes, as stress concentration at the defects did not significantly influence the fatigue performance.

Double-pulse femtosecond laser peening of aluminum alloy AA5038: Effect of inter-pulse delay on transient optical plume emission and final surface micro-hardness

2016 ◽  
Vol 109 (21) ◽  
pp. 211902 ◽  
Author(s):  
E. I. Ageev ◽  
V. Yu. Bychenkov ◽  
A. A. Ionin ◽  
S. I. Kudryashov ◽  
A. A. Petrov ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Femtosecond Laser ◽  
Double Pulse ◽  
Laser Peening ◽  
Micro Hardness ◽  
Pulse Delay ◽  
Final Surface ◽  
Plume Emission

Study on mechanical properties and microstructure of 2024-T351 aluminum alloy treated by cryogenic laser peening

2019 ◽  
Vol 120 ◽  
pp. 105670 ◽  
Author(s):  
Jing Li ◽  
Jianzhong Zhou ◽  
Yunhui Sun ◽  
Aixin Feng ◽  
Xiankai Meng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Laser Peening

Enhancement of fatigue properties of 2024-T351 aluminum alloy processed by cryogenic laser peening

Vacuum ◽  
2019 ◽  
Vol 164 ◽  
pp. 41-45 ◽  
Author(s):  
Jing Li ◽  
Aixin Feng ◽  
Jianzhong Zhou ◽  
Huan Chen ◽  
Yunjie Sun ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Properties ◽  
Laser Peening

scholarly journals Effects of laser peening on the fatigue strength and defect tolerance of aluminum alloy

2020 ◽  
Vol 43 (4) ◽  
pp. 845-856 ◽  
Author(s):  
Koji Takahashi ◽  
Yuta Kogishi ◽  
Norihito Shibuya ◽  
Fumiaki Kumeno
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Strength ◽  
Laser Peening ◽  
Defect Tolerance

scholarly journals Relaxation Behaviour of Laser Peening Residual Stress due to Mechanical Loading on Aluminum Alloy

2011 ◽  
Vol 60 (7) ◽  
pp. 617-623 ◽  
Author(s):  
Daisuke MIYASHITA ◽  
Kazuya TAKEDA ◽  
Shin-ich OHYA ◽  
Yuji SANO ◽  
Toshiyuki SAITO ◽  
...  
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Mechanical Loading ◽  
Laser Peening ◽  
Relaxation Behaviour
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