On the effect of shot-peening on fatigue resistance of AlSi10Mg specimens fabricated by additive manufacturing using selective laser melting (AM-SLM)

Uzan, Naor Elad; Ramati, S. D. E.; Shneck, R.; Frage, N.; Yeheskel, O.

doi:10.1016/j.addma.2018.03.030

Cited by 121 publications

(70 citation statements)

References 27 publications

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“…Therefore, other surface treatments not involving machining or polishing can result advantageous. In this regard, some authors investigated the effect of sandblasting or shot-peening on fatigue enhancement of AlSi10Mg alloy [44][45][46]. In particular, in [45] sand-blasting and shotpeening were demonstrated to remarkably improve fatigue strength compared to as-fabricated specimens.…”

Section: Introductionmentioning

confidence: 99%

Evaluation on the fatigue behavior of sand-blasted AlSi10Mg obtained by DMLS

Pola

Battini

Tocci

et al. 2019

Frattura Ed Integrità Strutturale

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Fatigue tests were performed on sand-blasted AlSi10Mg samples produced by Direct Metal Laser Sintering (DMLS) of powders. The effect of sand-blasting on surface properties was evaluated by roughness and residual stresses measurements, together with morphological analysis, in comparison with asfabricated condition. An evident improvement of surface finishing was observed after sand-blasting, which also lead to the presence of compressive residual stress on the external surface of samples, as revealed by XRD measurements. Furthermore, defects analysis allowed the identification of a uniform distribution of porosities in the cross section whereas larger porosities seem more abundant close to the surface. It was found that the tested material exhibits good fatigue resistance, supporting the positive role of sand-blasting as a simple post-processing treatment. Superficial defects are the preferential crack initiation sites, as demonstrated by SEM analysis of fracture surfaces.

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Section: Introductionmentioning

confidence: 99%

Evaluation on the fatigue behavior of sand-blasted AlSi10Mg obtained by DMLS

Pola

Battini

Tocci

et al. 2019

Frattura Ed Integrità Strutturale

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“…They showed that SP using S170 steel beads reduces the porosity by 0.1-0.3% and increases the fatigue strength of the as-built parts. Uzan et al [19] investigated the influence of SP on the fatigue resistance of AlSi10Mg using steel and ceramic beads. They showed that the mechanical or electrolytic polishing after shot peening could increase the material fatigue resistance.…”

Section: Introductionmentioning

confidence: 99%

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Maamoun

Elbestawi

Veldhuis

2018

JMMP

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Abstract:The additive manufacturing (AM) of aluminum alloys promises to considerably enhance the performance of lightweight critical parts in various industrial applications. AlSi10Mg is one of the compatible Al alloys used in the selective laser melting of lightweight components. However, the surface defects obtained from the as-built parts affect their mechanical properties, and thus represent an obstacle to using them as final products. This study aims to improve the surface characteristics of the as-built AlSi10Mg parts using shot peening (SP). To achieve this goal, different SP intensities were applied to various surface textures of the as-built samples. The SP results showed a significant improvement in the as-built surface topography and a higher value of effective depth using 22.9 A intensity and Gp165 glass beads. The area near the shot-peened surface showed a significant microstructure refinement to a specific depth due to the dynamic precipitation of nanoscale Si particles. Surface hardening was also detected and high compressive residual stresses were generated due to severe plastic deformation. The surface characteristics obtained after SP could result in a significant improvement in the mechanical properties and fatigue strength, and thus promise performance enhancement for critical parts in various industrial applications.

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“…The main current methods of additive manufacturing, such as stereolithography (SLA), selective laser sintering, selective laser melting, and fused deposition modelling (FDM) have their own advantages and deficiencies in terms of the starting materials, processing speed, resolution, cost, and so on. For instance, SLA has an advantage of high printing resolution, which has the capability of producing features to tens of micrometer .…”

Section: Each Layer's Processing Parametersmentioning

confidence: 99%

Stepwise Optimized 3D Printing of Arbitrary 3D Structures at Millimeter Scale with High Precision Surface

Yang

Zhao

Zheng

et al. 2019

Macro Materials & Eng

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3D printing based on additive manufacturing has attracted widespread attention in the fields of microbiology and microelectronics due to its advantages of waste reduction, arbitrary manufacturing, and rapid prototyping in potential applications. These techniques can create structures at the centimeter scale, however, there are some limitations in terms of resolution and geometric constraints. Here, a micro–nano 3D printing protocol based on additive manufacturing to achieve the 3D structure (3DS) not only possessing millimeter scale structural dimensions but also nanometer features are proposed. A theory is verified to assist the design and fabrication of the 3DS with millimeter scale and nanometer precision. The structures are predesigned and the scanning strategy is optimized before 3D printing to improve the manufacturing efficiency and precision. A customized 3DS with a height of 2.2 mm is obtained, which is a challenge for the conventional two‐photon polymerization fabrication. Furthermore, a 1.2 mm 3DS with inside scaffold and smooth surface is efficiently achieved within 2.7 h with a nanometer surface roughness by using the proposed stepwise optimized 3D printing process. This study offers a flexible and low‐cost technology to generate highly customizable, precisely controllable 3DS for potential applications in microelectronics and microdevices.

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On the effect of shot-peening on fatigue resistance of AlSi10Mg specimens fabricated by additive manufacturing using selective laser melting (AM-SLM)

Cited by 121 publications

References 27 publications

Evaluation on the fatigue behavior of sand-blasted AlSi10Mg obtained by DMLS

Evaluation on the fatigue behavior of sand-blasted AlSi10Mg obtained by DMLS

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Stepwise Optimized 3D Printing of Arbitrary 3D Structures at Millimeter Scale with High Precision Surface

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