Fatigue Life Behavior of Laser Shock Peened Duplex Stainless Steel with Different Samples Geometry

Jiménez, César A. Vázquez; Granados-Alejo, V.; Rubio-González, C.; Gómez-Rosas, G.; Zamorano, Sergio Llamas

doi:10.1155/2019/8053248

Cited by 3 publications

(2 citation statements)

References 31 publications

(37 reference statements)

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“…As has been observed in recent investigations, the thickness of the specimens influences the fatigue life: the smaller the thickness, the greater the improvement; this is because the residual compressive stresses reach a greater depth over the thickness of the specimen, reducing the effect of the notch stress concentrator [14]. This has been observed in specimens of a single material and processed with conventional manufacturing, that is, samples without coating and obtained with conventional machining [14,38]. It is worth noting that, in the case of Ti-6Al-4V alloy components remanufactured by a combination of LC and LSP, an enhancement in fatigue life up to 164% has been reported [18].…”

Section: Fatigue Lifementioning

confidence: 65%

Fatigue Life and Residual Stress of Flat Stainless Steel Specimens Laser-Cladded with a Cobalt-Based Alloy and Postprocessed with Laser Shock Peening

Flores-García,

Martínez-Pérez,

Rubio-González

et al. 2024

JMMP

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Laser cladding (LC) is a versatile additive manufacturing process where strands of metallic material are deposited and melted by a laser. However, there are some limitations associated with this process that may affect the performance of the final manufactured parts. In the present work, the influence of laser shock peening (LSP) on the fatigue life of 304 stainless steel flat specimens with a cobalt-based alloy (Stellite 6) coating applied by LC was investigated. The analysis was carried out both experimentally and numerically. In the LSP simulation, the ABAQUS/Explicit code was used to determine the residual stress distribution of specimens with double central notches with a radius of curvature of 5, 10, 15, and 20 mm. From the numerical results, an improvement was found regarding fatigue life up to 48% in samples with LSP. Experimentally, 14% in fatigue life enhancement was observed. The residual stress, determined by the contour method, showed good agreement with the LSP simulation. The SEM images revealed that the fatigue failure started at the Stellite 6 coating and propagated towards the center of the specimen. LSP has been shown to be a suitable postprocessing alternative for laser-cladded parts that will be subjected to fatigue loading since it led to fatigue improvement through the introduction of compressive residual stresses on clad coatings.

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Section: Fatigue Lifementioning

confidence: 65%

Fatigue Life and Residual Stress of Flat Stainless Steel Specimens Laser-Cladded with a Cobalt-Based Alloy and Postprocessed with Laser Shock Peening

Flores-García,

Martínez-Pérez,

Rubio-González

et al. 2024

JMMP

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“…Simulations of LSP process are in great development. However recent simulation works tend to configuration using small spot size (from 1 mm to 3 mm) but implement pressure loading profile developed for large and monodimensional spot [18,19].…”

Section: Plasma Lifetime Measurements With High-speed Photodiodementioning

confidence: 99%

Beam size dependency of a laser-induced plasma in confined regime: Shortening of the plasma release. Influence on pressure and thermal loading

Rondepierre

Ünaldi

Rouchausse

et al. 2021

Optics & Laser Technology

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Processes using laser-shock applications, such as Laser Shock Peening or Laser Stripping require a deep understanding of both mechanical and thermal loading applied. We hereby present new experimental measurements of the plasma pressure release regarding its initial dimension, which depends on the laser beam size. Our data were obtained through shock waves' velocity analysis and radiometric assessments. A new model to describe the adiabatic release behavior of a laser-induced plasma with a dependency to the beam size is developed. The results and the associated model exhibit that the plasma release duration is shortened with smaller laser spots. As a consequence, with chosen smaller laser spots (0.6 mm to 1 mm), the thermal loading applied during the plasma lifetime will also decrease. These new results shall help for a better understanding of laser-matter interaction for laser-shock applications by giving more accurate plasma profiles. Thus, process simulations can be improved as well. Eventually, by considering recent developments with high-power Diode Pumped Solid-State lasers (DPSS), we now expect to develop a new configuration for LSP which could be applicable both without any thermal coating and deliverable by an optical fiber.

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Effect of alloying elements and heat treatment on microstructure, metallurgical and machinability properties of duplex stainless steels - A review

Janardhan,

Suresh,

Chandrappa

et al. 2023

PHYSICAL MESOMECHANICS OF CONDENSED MATTER: Physical Principles of Multiscale Structure Formation and the Mechanisms of Nonline

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Fatigue Life Behavior of Laser Shock Peened Duplex Stainless Steel with Different Samples Geometry

Cited by 3 publications

References 31 publications

Fatigue Life and Residual Stress of Flat Stainless Steel Specimens Laser-Cladded with a Cobalt-Based Alloy and Postprocessed with Laser Shock Peening

Fatigue Life and Residual Stress of Flat Stainless Steel Specimens Laser-Cladded with a Cobalt-Based Alloy and Postprocessed with Laser Shock Peening

Beam size dependency of a laser-induced plasma in confined regime: Shortening of the plasma release. Influence on pressure and thermal loading

Effect of alloying elements and heat treatment on microstructure, metallurgical and machinability properties of duplex stainless steels - A review

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