Elucidating the mechanism of defect formation in the 7050-T7451 aluminum alloy by laser shock peening

Ge, Liangchen; Chen, Haotian; Guan, Hua; Xu, Boyuan; Tian, Zongjun

doi:10.1080/17455030.2022.2048124

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…In this paper, finite element method analysis software ABAQUS 6-14.5 [15] was used to simulate and analyze the strengthening process of laser shock E690 high strength steel, and the influence of different impact pressures on the strengthening effect was simulated. According to the axisymmetric characteristics of the model and ensure the accuracy of the simulation results, a quarter model was designed for simulation with a size of 5 mm×5 mm×5 mm, and the spot diameter was 5 mm.…”

Section: Simulation Designmentioning

confidence: 99%

Study on surface nanocrystallization and dislocation configuration of E690 steel strengthened by laser shock peening

Chen¹,

Ge²,

Guan³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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Through the combination of simulation and experiment, this paper explored the direct relationship between laser energy and surface nanocrystallization of E690 steel, and analyzed the indirect relationship between surface residual compressive stress and surface nanocrystallization. The experimental and simulation results showed that when the laser energy reached 10J, grain refinement occurred on the surface of E690 steel, and the maximum residual compressive stress appeared on the sub surface of the material. At the same time, with the increase of laser energy, violent vibration and extrusion occurred between lattices, resulting in a certain micro thermal effect and inducing the climbing of screw dislocations. Therefore, there was a qualitative relationship between the surface nanocrystallization of E690 steel after laser shock peening and the distribution of residual stress, that was, when the maximum residual stress appeared on the sub surface, the surface of material appeared nanocrystallization. This was because surface nanocrystallization consumed a lot of energy, which reduced the surface residual stress. This study was of great significance to predict the dislocation configuration changes of E690 steel after laser shock peening.

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Section: Simulation Designmentioning

confidence: 99%