Evaluation of laser shock peening process parameters incorporating Almen strip deflections

Glaser, Daniel; Polese, C.; Venter, А.M.; Marais, Deon; Plaisier, Jasper R.

doi:10.1016/j.surfcoat.2022.128158

Cited by 16 publications

(8 citation statements)

References 30 publications

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“…Herein, the highest laser power density, that is, 25 GW/ cm 2 , indicates a larger value of compressive residual stress induction. 18,19 The study reveals that the higher laser power density used for the laser shock peening process has the effect of inducing larger and deeper compressive residual stresses for the laser spot diameter of 1 mm, as shown in Figure 4. The higher overlapping rate at very highpower densities may cause a deterioration of the surface finish, even though the sub-surface compressive residual stresses are effective.…”

Section: Residual Stress Measurement Analysis Via Xrd and Incremental...mentioning

confidence: 94%

“…As a preliminary screening technique, an Almen strip approach adapted for LSP process parameter evaluation was employed to estimate the saturation threshold for laser power density. 17 The Almen deflections for the laser used in this study (532 nm wavelength with a 5.1 ns pulse duration) are compared for a laser operating at 1064 nm with an 8.6 ns pulse duration (Figure 1). The Almen data clearly reveals significant deflection beyond 15 GW/ cm 2 for the current laser.…”

Section: Laser Shock Peeningmentioning

confidence: 99%

“…XRD and IHD are therefore highly complementary techniques, where a combination is highly suited for evaluation of LSP induced residual stress. 19 The IHD process was executed on a SINT MTS3000-Restran instrument, equipped with EVAL 7 Premium Software. Drilling was performed using a high-speed inverted cone carbide end-mill to drill a 1.2 mm hole in 60 increments of 0.02 mm.…”

Section: Materials Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

Effect of laser shock peening on austempered ductile iron

Bonnici

Prabhakaran

Glaser

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this study, laser shock peening (LSP) has been applied on austempered ductile iron (ADI) to determine the optimum laser power and spot overlapping rate required for automotive gear applications. The surface roughness and phases present were studied to understand the effect of the laser shock wave application on the material. An increase in the mean surface roughness was achieved when the laser spot overlap increased from 20% to 60%. A significant increase in the microhardness was obtained in the surface and sub-surface, indicating an increased dislocation density of the material. Compressive residual stress depth and magnitude characterized by X-ray Diffraction (XRD) and Incremental Hole Drilling (IHD) were found to increase with laser power density. This work significantly identifies the pathway toward the engineering manufacture of austempered ductile iron and the application of LSP for the automotive drive-train industries.

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Section: Residual Stress Measurement Analysis Via Xrd and Incremental...mentioning

confidence: 94%

Section: Laser Shock Peeningmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Effect of laser shock peening on austempered ductile iron

Bonnici

Prabhakaran

Glaser

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Driven by the needs of local industry, LSP has led to process research related to industrial applications-mainly in the power generation sector, the mining sector, and the aerospace sector. [45,[108][109][110] Currently, CSIR has two LSP work cells. A laser system with a wavelength of 1064 nm is used for academic research, and a 532 nm laser system is being devised for industrial applications.…”

Section: Global Research and Application Of Lspmentioning

confidence: 99%

A Critical Review of Laser Shock Peening of Aircraft Engine Components

Huang

Zou³

et al. 2023

Adv Eng Mater

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Many aviation accidents are caused by the failure of aircraft engine components, and engine blades are especially vulnerable to high‐cycle fatigue fracture in severe working environments as well as to impact damage caused by foreign objects. To address this problem, the United States took the lead and has been successful in implementing laser shock peening (LSP) as a surface treatment for aircraft engine components to enhance their fatigue performance. This review provides an overview of the development of LSP for use in treating aircraft engine components over the past three decades, with a brief introduction to the development of high‐energy pulsed lasers for LSP. A particular focus of this review is on the limitations and challenges associated with the application of LSP for treating critical aircraft engine components. It is hoped that this review serves as a reference for future research and development that can lead to better performance of these components.

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“…A variety of technological processes are available to improve the mechanical properties of metallic material surfaces [3], e.g., cold and hot rolling [4], shot peening [5], laser shock peening (LSP), etc. LSP has gained significant attention as a surface modification technique capable of enhancing wear resistance in metallic materials [3].…”

Section: Introductionmentioning

confidence: 99%

Laser Shock Peening: Fundamentals and Mechanisms of Metallic Material Wear Resistance Improvement

Cao,

Wu,

Zhong

et al. 2024

Materials

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With the rapid development of the advanced manufacturing industry, equipment requirements are becoming increasingly stringent. Since metallic materials often present failure problems resulting from wear due to extreme service conditions, researchers have developed various methods to improve their properties. Laser shock peening (LSP) is a highly efficacious mechanical surface modification technique utilized to enhance the microstructure of the near-surface layer of metallic materials, which improves mechanical properties such as wear resistance and solves failure problems. In this work, we summarize the fundamental principles of LSP and laser-induced plasma shock waves, along with the development of this technique. In addition, exemplary cases of LSP treatment used for wear resistance improvement in metallic materials of various nature, including conventional metallic materials, laser additively manufactured parts, and laser cladding coatings, are outlined in detail. We further discuss the mechanism by which the microhardness enhancement, grain refinement, and beneficial residual stress are imparted to metallic materials by using LSP treatment, resulting in a significant improvement in wear resistance. This work serves as an important reference for researchers to further explore the fundamentals and the metallic material wear resistance enhancement mechanism of LSP.

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Evaluation of laser shock peening process parameters incorporating Almen strip deflections

Cited by 16 publications

References 30 publications

Effect of laser shock peening on austempered ductile iron

Effect of laser shock peening on austempered ductile iron

A Critical Review of Laser Shock Peening of Aircraft Engine Components

Laser Shock Peening: Fundamentals and Mechanisms of Metallic Material Wear Resistance Improvement

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