Optimizing Parameters with FEM Model for 20CrMnTi Laser Shocking

Article Engineering, Mechanical

Fatigue strength improvement in Ti-6Al-4V subjected to foreign object damage by combined treatment of laser shock peening and shot peening

Lingfeng Wang et al.

Summary: The study found that combined laser shock peening and shot peening treatment can significantly improve the hardness and fatigue resistance of Ti-6Al-4V alloy specimens, especially showing more obvious effects under low energy impact.

INTERNATIONAL JOURNAL OF FATIGUE (2022)

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Article Materials Science, Multidisciplinary

Formation Mechanism and Weights Analysis of Residual Stress Holes in E690 High-Strength Steel by Laser Shock Peening

Yupeng Cao et al.

Summary: This study investigates the mechanism of surface residual stress hole formation induced by laser shock peening (LSP) and assigns weights to the relevant causes in an E690 high-strength steel sheet. Experiments and simulations show that the combined effect of shock wave reflection and convergence of rarefaction waves towards the center results in the formation of residual stress holes on the material's surface, with shock wave reflection having a slightly greater impact.

COATINGS (2022)

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Article Engineering, Mechanical

Carbide-facilitated nanocrystallization of martensitic laths and carbide deformation in AISI 420 stainless steel during laser shock peening

Changyu Wang et al.

Summary: In this study, the surface microstructure of AISI 420 martensitic stainless steel was modified using laser shock peening (LSP) technique, and the deformation mechanisms were investigated through observing microstructural evolution. The results showed that laser shock wave caused severe deformation in the original sub micron carbide, leading to carbide fragmentation and promoting nanocrystallization of martensitic laths. Additionally, carbide decomposition occurred simultaneously with severe plastic deformation, and this, along with fine grain strengthening, precipitation strengthening, and dislocation strengthening induced by LSP, contributed to an increase in the strength and ductility of AISI 420 martensitic stainless steel.

INTERNATIONAL JOURNAL OF PLASTICITY (2022)

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Article Optics

The effect of laser shock peening on surface integrity and high and very high cycle fatigue properties of 2024-T351 aluminum alloy

Zhi Qin et al.

Summary: This study investigates the impact of laser shock peening (LSP) on surface integrity, high cycle fatigue (HCF), and very high cycle fatigue (VHCF) properties of 2024-T351 aluminum alloy. The results show that LSP treatment increases surface roughness and microhardness, refines subgrain sizes, and introduces high-level compressive residual stresses. The fatigue life of the specimens is reduced, with a more significant effect at higher laser pulse energy.

OPTICS AND LASER TECHNOLOGY (2022)

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Article Physics, Multidisciplinary

Numerical analysis on residual stress hole generation in laser shock peening

Abhishek et al.

Summary: Laser shock peening (LSP) is a surface treatment technique that induces compressive residual stress on materials. The spatial distribution of pressure pulses during laser shock was found to have an impact on the residual stress distribution and longitudinal wave attenuation. The study highlights the uneven residual stress distribution near the surface and the effectiveness of different spatial distributions in reducing stress holes and attenuating longitudinal waves.

EUROPEAN PHYSICAL JOURNAL PLUS (2022)

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Article Engineering, Mechanical

Multiaxial fatigue life prediction model considering stress gradient and size effect

He Zhao et al.

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING (2022)

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Article Chemistry, Physical

Numerical Prediction of the Effect of Laser Shock Peening on Residual Stress and Fatigue Life of Ti-6Al-4V Titanium Alloy

Peixuan Ouyang et al.

Summary: In this study, the residual stress field of Ti-6Al-4V titanium alloy induced by laser shock peening (LSP) was simulated using finite element method (FEM), and the fatigue lives of LSP-treated specimens were predicted using Fe-safe software. The results showed that LSP treatment can significantly improve the fatigue life of alloy components by producing a high level of compressive residual stress.

MATERIALS (2022)

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Proceedings Paper Computer Science, Interdisciplinary Applications

Fracture Data Analysis and Calculation of Drilling Tools in Gravel Formation in Dabei/Bozi Block

Jinsong Huang et al.

Summary: Drilling tool fracture is one of the serious failure forms in the process of drilling operation. This paper takes the second opening interval in Dabei/Bozi block in Tarim basin as an example, analyzes the process and external characteristics of drilling tool fracture accidents, and explores the causes and mechanism of this type of accident.

2022 IEEE INTERNATIONAL CONFERENCE ON ELECTRICAL ENGINEERING, BIG DATA AND ALGORITHMS (EEBDA) (2022)

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Article Engineering, Aerospace

Influence of laser shock peening on surface integrity and tensile property of high strength low alloy steel

Yong Wang et al.

Summary: Laser Shock Peening (LSP) is an effective surface treatment technique commonly used to improve mechanical properties of materials. This study on high strength low alloy steel revealed that LSP did not change the tensile strength but transformed the yield characteristic, leading to improved fatigue life. The deeper compressive residual stress and flat grains induced by LSP were identified as contributing factors to these changes in material properties.

CHINESE JOURNAL OF AERONAUTICS (2021)

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Article Optics

Effects of laser shock peening on the ultra-high cycle fatigue performance of additively manufactured Ti6Al4V alloy

Qinghong Jiang et al.

OPTICS AND LASER TECHNOLOGY (2021)

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Article Nanoscience & Nanotechnology

The effects of shot peening, laser shock peening and ultrasonic nanocrystal surface modification on the fatigue strength of Inconel 718

Erfan Maleki et al.

Summary: Using different surface treatment techniques can effectively improve the material performance and lifetime of nickel-based super-alloy Inconel 718. Increasing the kinetic energy of the surface treatments can promote grain refinement and induce deep compressive residual stress, thus enhancing fatigue performance. Ultrasonic nanocrystal surface modification is the most efficient surface treatment method.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2021)

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Article Engineering, Chemical

The significance of positive and negative inertial forces in Particle-Bubble interaction and their role in the general flotation kinetics model

Behzad Vaziri Hassas et al.

Summary: This study presents a theoretical evaluation of the effects of inertial forces in particle-bubble interactions during the flotation process, supported by experimental data. The results demonstrate the potential of particle density to counteract the negative effects of inertial forces.

MINERALS ENGINEERING (2021)

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Article Optics

The effect of rolling contact fatigue properties on 316 stainless steel under laser shock peening

Fengze Dai et al.

Summary: After treatment with laser shock peening technology, the rolling contact fatigue performance of 316 stainless steel has been significantly improved, mainly due to the induction of high amplitude compressive residual stress on the surface layer. In addition, the treated 316 stainless steel is sensitive to contact stress.

OPTICS AND LASER TECHNOLOGY (2021)

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Article Optics