The homogeneity of multi-textured micro-pattern arrays in a laser shock surface patterning process and its effect on the surface properties of aluminum alloy

Koo, Se Joo; Kim, Hong Seok

doi:10.1016/j.surfcoat.2019.125149

Cited by 15 publications

(1 citation statement)

References 36 publications

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“…LSP is a non-contact method with the advantages of high controllability, high flexibility, and high efficiency. The mechanism of LSP is irradiating a metal surface with a short pulsed and high peak power density laser [11][12][13]. In response, the metal surface forms a high-pressure plasma wave, leading to the enhancement of surface mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Relations between Surface Stress State and Microstructure Feature for Enhancing the Fatigue Performance of TC6 Titanium Alloy

Shu

Huang

Cheng³

et al. 2021

Coatings

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Fatigue performance has always been an important factor affecting the application of titanium alloy. The service life of TC6 titanium alloy is easily reduced under a continuously alternating load. Therefore, there is an urgent need for a new method to improve fatigue performance. Laser shock peening (LSP) is a widely proposed method to enhance the fatigue performance. Here, through experiments and finite element simulations, it was found that LSP can prolong the fatigue life of TC6 by improving the surface stress state. In strengthening processes, the generation of residual stress was mainly attributed to the change of microstructure, which could be reflected by the statistical results of grain sizes. The content of grains with a size under 0.8 μm reached 78%, and the microhardness value of treated TC6 was 18.7% higher than that of an untreated sample. In addition, the surface residual compressive stress was increased to −600 MPa at the depth of 1500 μm from the surface. On this basis, the fatigue life was prolonged to 135%, and the ultimate fracture macroscopic was also changed. With the treatment of LSP, the fatigue performance of TC6 is highly promoted. The strengthening mechanism of LSP was established with the aim of revealing the relationship between microstructure and stress state for enhancing the fatigue performance in whatever shapes.

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Section: Introductionmentioning

confidence: 99%

Understanding the Relations between Surface Stress State and Microstructure Feature for Enhancing the Fatigue Performance of TC6 Titanium Alloy

Shu

Huang

Cheng³

et al. 2021

Coatings

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Laser‐Induced Shockwaves as a Rapid and Non‐Contact Technique for 2D Patterning of Colloidal Monolayer Crystals

Nguyen,

Park,

Park

et al. 2024

Adv Materials Inter

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A novel approach is reported that harnesses laser‐induced shockwave spallation technique to selectively remove clusters of polystyrene (PS) microspheres from close‐packed monolayers for the creation of 2D colloidal micropatterns. The strategic design of the layer structure by incorporating a thin layer of poly(vinyl alcohol) (PVA) on top of the PS monolayer enables the complete delamination of PS particle clusters. Its use is demonstrated for creating different sizes of circular microscale spallation patterns by regulating the tensile force of the shockwave with laser fluence adjustments. To further control the diameter of the spallation pattern, various shadow masks are utilized to tune the shockwave generation region. The finding reveals that both PVA thickness and spallation force play key roles in adjusting cluster spallation size with complete removal. The study highlights the potential of laser spallation techniques as a rapid and non‐contact method for 2D colloidal crystal patterning by leveraging spatially regulated shockwave spallation forces.

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Tribological characteristics and advanced processing methods of textured surfaces: a review

Bao

Xing

et al. 2021

Int J Adv Manuf Technol

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The homogeneity of multi-textured micro-pattern arrays in a laser shock surface patterning process and its effect on the surface properties of aluminum alloy

Cited by 15 publications

References 36 publications

Understanding the Relations between Surface Stress State and Microstructure Feature for Enhancing the Fatigue Performance of TC6 Titanium Alloy

Understanding the Relations between Surface Stress State and Microstructure Feature for Enhancing the Fatigue Performance of TC6 Titanium Alloy

Laser‐Induced Shockwaves as a Rapid and Non‐Contact Technique for 2D Patterning of Colloidal Monolayer Crystals

Tribological characteristics and advanced processing methods of textured surfaces: a review

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