Surface Integrity of additively manufactured Inconel-718 by peening approaches

Haribaskar, R.; Kumar, Tarun; Tamiloli, N.

doi:10.1080/10426914.2022.2146716

Cited by 11 publications

(2 citation statements)

References 39 publications

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“…Further, SS316L subjected to LSP enhanced its mechanical properties. LSP without a sacrificial layer is a novel and unique surface modification approach for improving mechanical characteristics by inducing favorable CRS [46,47].…”

Section: Introductionmentioning

confidence: 99%

The impact of successive laser shock peening on surface integrity and residual stress distribution of laser powder-bed fused stainless steel 316L

Haribaskar,

Kumar

2024

Phys. Scr.

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The utilization of laser shock peening (LSP) in laser powder bed fused (LPBF) stainless steel (SS) 316L components enhances the mechanical characteristics and operational lifespan of the product quality through a significant reduction of residual stress and a noticeable increase in roughness parameters. The key objective of the study is to analyze the influence of consecutive laser shock peening (LSP) without ablative coating and low pulse energy on the surface properties, residual stress distribution, and microhardness of samples produced by LPBF with SS316L material. The surface quality of the sample subjected to consecutive laser shock peening shows a slight deterioration in its condition. This can be attributed to the combined impact of ablative surface and surface damage resulting from the production of high-energy plasma. However, the implementation of successive LSP results in a distinctive enhancement of compressive residual stresses (CRS) that are evenly distributed throughout the central axis and sharp edges. In contrast, the as-built condition exhibits non-uniform stress magnitudes. CRS observed in each LSP iteration exhibits a notable increase, reaching a maximum magnitude of -389 MPa compared to the initial stress level of 165 MPa in the as-built sample. This enhancement can be attributed to the repetitive impact of shock waves on the surface, leading to the formation of plastic deformation. The refinement of surface grains and the presence of favorable residual stresses were proven by the utilization of X-ray diffraction (XRD) studies and the Cos α plot. The XRD investigation also indicated the absence of any newly formed phases or secondary phases. A significant enhancement in microhardness was observed, with an increase of 58.3% achieved after the third consecutive peening process. The successive LSP samples displayed a gradual improvement in electrochemical behavior. Though the amplitude parameters increased after LSP, the increase in wear rate was observed.

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Section: Introductionmentioning

confidence: 99%

The impact of successive laser shock peening on surface integrity and residual stress distribution of laser powder-bed fused stainless steel 316L

Haribaskar,

Kumar

2024

Phys. Scr.

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“…Additive manufacturing (AM) systems are among the best approaches for creating complex, individualized bio-inspired structures since they allow for ne control over the topographical features of bio-inspired structures includes the dimensions, pro le of the units and struts [11]- [13]. Through additive manufacturing processes, nearly all geometry that can be represented in a digital CAD platform may be created.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of compressive behaviour for SS316L bioinspired cores fabricated by powder bed fusion

Gunasegeran

Sudhagar

Barathan

et al. 2023

Preprint

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Bio-inspired structures have been commonly used in robotics, aerospace, and bioengineering because of their extraordinary qualities. The present study investigates compressive behavior for bioinspired cores. The experimental compression behavior of the bioinspired cores is supported with numerical analysis. As bioinspired structures are complex in nature, it is difficult to fabricate with the conventional technique. powder bed fusion (PBF) is employed to overcome this difficulty. Further specific energy absorption due to the compression behavior of the bioinspired cores and residual stress induced during the manufacturing process is investigated in detail, and the best-performing bioinspired core is reported in this study.

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The impact of energy density and process parameters on the distribution of residual stresses in additively manufactured stainless steel 316 L

Haribaskar,

Kumar

2024

Appl. Phys. A

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Surface Integrity of additively manufactured Inconel-718 by peening approaches

Cited by 11 publications

References 39 publications

The impact of successive laser shock peening on surface integrity and residual stress distribution of laser powder-bed fused stainless steel 316L

The impact of successive laser shock peening on surface integrity and residual stress distribution of laser powder-bed fused stainless steel 316L

Experimental and numerical investigation of compressive behaviour for SS316L bioinspired cores fabricated by powder bed fusion

The impact of energy density and process parameters on the distribution of residual stresses in additively manufactured stainless steel 316 L

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