Effects of overlapping rate on the uniformities of surface profile of LY2 Al alloy during massive laser shock peening impacts

2015 ◽  
Vol 266 ◽  
pp. 49-56 ◽  
Author(s):  
K.Y. Luo ◽  
T. Lin ◽  
F.Z. Dai ◽  
X.M. Luo ◽  
J.Z. Lu
Keyword(s):  
Surface Profile ◽  
Laser Shock Peening ◽  
Al Alloy ◽  
Laser Shock ◽  
Shock Peening

scholarly journals Improvement of Fatigue Life of GH3039 Superalloy by Laser Shock Peening

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3849
Author(s):  
Yang Tang ◽  
MaoZhong Ge ◽  
Yongkang Zhang ◽  
Taiming Wang ◽  
Wen Zhou
Keyword(s):  
Residual Stress ◽  
Fatigue Life ◽  
Surface Profile ◽  
Optical Microscope ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Transmission Electron ◽  
Before And After ◽  
Shock Peening ◽  
Improve Fatigue

In order to improve fatigue life of GH3039 superalloy, GH3039 superalloy sheets were treated by laser shock peening (LSP). The microstructure of GH3039 superalloy before and after LSP was characterized using an optical microscope, transmission electron microscope (TEM), and X-ray diffractometer. The fatigue life of the samples with and without LSP was investigated by fatigue experiments. Moreover, surface profile and residual stress were also examined. Experimental results indicated that the grains in the surface layer of the LSP sample were remarkably refined and reached the nanometer scale. The average surface roughness increased from 0.024 μm to 0.19 μm after LSP. The average fatigue life of the laser treated samples was 2.01 times larger than that of the untreated specimens. Additionally, mathematical statistical analysis confirms that LSP has a significant influence on the fatigue life of GH3039 superalloy. The improvement of fatigue life for the laser processed GH3039 superalloy was mainly attributed to compressive residual stress and grain refinement generated by LSP.

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.

Comparison of warm laser shock peening and laser shock peening techniques in lengthening the fatigue life of welded joints made of aluminum alloy

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744045 ◽  
Author(s):  
Chun Su ◽  
Jianzhong Zhou ◽  
Xiankai Meng ◽  
Jie Sheng
Keyword(s):  
Residual Stress ◽  
Fatigue Life ◽  
Welded Joints ◽  
Laser Shock Peening ◽  
Fracture Mechanisms ◽  
Al Alloy ◽  
Laser Shock ◽  
Estimation Model ◽  
Surface Residual Stress ◽  
Shock Peening

Welded joints made of 6061-T6 Al alloy were studied to evaluate warm laser shock peening (WLSP) and laser shock peening (LSP) processes. The estimation model of laser-induced surface residual stress was examined by means of experiments and numerical analysis. The high-cycle fatigue lives of welded joint specimens treated with WLSP and LSP were estimated by conducting tensile fatigue tests. The fatigue fracture mechanisms of these specimens are studied by surface integrity and fracture surface tests. Experimental results and analysis indicated that the fatigue life of the specimens processed by WLSP was higher than that with LSP. The large increase in fatigue life appeared to be the result of the larger residual stress, more uniform microstructure refinement and the lower surface roughness of the WLSP specimens.

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 microstructure and hot corrosion of TC11 alloy

2018 ◽  
Vol 335 ◽  
pp. 32-40 ◽  
Author(s):  
Zhaopeng Tong ◽  
Xudong Ren ◽  
Yunpeng Ren ◽  
Fengze Dai ◽  
Yunxia Ye ◽  
...  
Keyword(s):  
Hot Corrosion ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening
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