Optimization of Thin Walls with Sharp Corners in SS316L and IN718 Alloys Manufactured with Laser Metal Deposition

Pereira, Juan Carlos; Borovkov, Herman; Zubiri, F.; Guerra, Mari Carmen; Caminos, Josu

doi:10.3390/jmmp5010005

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…8, b) with a reported mass of seven kilograms. It indicates that the prepared design in PIGs shows good progress in cleaning the pipelines correctly [27]. On the other hand, the inline inspection MFL tool confirmed that it can safely pass through the known geometry anomaly inside the pipeline, as shown in Fig.…”

Section: Inline Inspection Resultsmentioning

confidence: 77%

Uplifting the study of the inline inspection technique on the buckling pipelines in pipeline integrity management strategy

Soelistiyono,

Soedarsono,

Munir

et al. 2024

EEJET

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This work reports the development of inline inspection (ILI) methodology to enhance the pigging activity for the dented pipeline, facilitate the pigging process to prevent Pipeline Inspection Gauge (PIG) from getting stuck and improve the safety passage for buckled pipelines. The recent report unveils the condition of the UNPIGGABLE pipelines, which reduce the inner diameter of pipelines to 257.51 mm, equivalent to 27.58 % of the initial diameter and restricts the pigging activity. In this report, the pull-through test coupled with the collapsibility test was conducted. The success of the test above allows the ILI equipment based on the magnetic flux leakage (MFL) technique to record the internal and external wall loss inwardly and geometric defect on diameter of the pipelines. The prepared artificial dented pipeline was made before it underwent several tests. Based on the pull-through test, the maximum force of 27000 N is more significant than the pipeline operating pressure to enable the MFL tool to pass through the pipelines despite exhibiting the geometry anomaly. Compressing the opposite magnetic yoke of the collapsibility test is critical, showing that the ILI MFL tool reaches its maximum compression of 242 mm. The value is lower than the minimum internal diameter of 257 mm. The ILI results show that the highest metal loss was achieved at 73 % at 15504 m at the bottom of the inspected pipelines. At the same time, the dented area reduces to more than 6 % of the pipelines’ nominal outer diameter and imposes the pipe’s integrity status to red. The distinctive result of the research can be used to model the future unprecedented pigging process when buckles appear in pipelines

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Section: Inline Inspection Resultsmentioning

confidence: 77%

Uplifting the study of the inline inspection technique on the buckling pipelines in pipeline integrity management strategy

Soelistiyono,

Soedarsono,

Munir

et al. 2024

EEJET

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“…Several key AM technologies are applied with DED (directed energy deposition) and LPBF (Laser Powder Bed Fusion) processes. The first category is preferred for larger volumes or for repairing existing components [10][11][12][13][14][15][16][17]. LPBF is nevertheless the most widely used for aerospace applications where high density or shape complexity are required [18][19][20][21].…”

Section: Additive Manufacturing In the Aerospace Sectormentioning

confidence: 99%

Design and Qualification of an Additively Manufactured Manifold for Aircraft Landing Gears Applications

Arena¹,

Ambrogiani²,

Raiola³

et al. 2023

Aerospace

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The continuous pursuit of reducing weight and optimizing manufacturing processes is increasingly demanded in transportation vehicles, particularly in the aerospace field. In this context, additive manufacturing (AM) represents a well-known technique suitable for re-engineering traditional systems, minimizing the product’s weight/volume and print time. The present research activity allowed for the exploration of the feasibility to replicate a conventional hydraulic manifold already certified for defence application with a lightweight and more compact issue through typical stringent aeronautical qualification steps. Computational modelling with lab test efforts made it possible to assess the compliance of the device with airworthiness certification requirements, giving a special focus to the fulfilment of structural requirements. In particular, the fatigue life characterization is still a crucial point to be well investigated in aeronautical components dfAM (designed for additive manufacturing) to demonstrate the maturity of the technology in the certification scenario. The new AM-driven design offers a more than 40 per cent weight reduction.

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“…Especially for the thin-wall parts, knowledge about the correlations between processing parameters and the final result is indispensable. [3], [4] This study explores the relation between the process parameter affecting the quality and properties of a series of AISI3016L stainless steel thin-walled parts produced by LMD. A six-axis robot was used with a deposition head that allows relative spatial movement between the powder nozzle and laser beam and substrate with high accuracy.…”

Section: Introductionmentioning

confidence: 99%

Influence of Process Parameters in LMD for Geometrical Accuracy and Thin Geometry with AISI316L

de Lemos,

Afonso,

Torcato

et al. 2023

KEM

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Laser metal deposition (LMD) industrial use demands research about the influence of the parameters in the built parts density, accuracy and mechanical properties. Especially for the thin-wall parts, knowledge about the correlations between processing parameters and the final result is indispensable. This study explores the relationship between process parameters and the quality of AISI316L stainless steel thin-walled parts produced by LMD. A six-axis robot equipped with a deposition head allowed relative spatial movement between the powder nozzle and laser beam and substrate with high accuracy. Controlled energy input provided by continuous wave Ytterbium fibre laser allows using less material flow rate and the production of thin layers in test samples. Three processing parameters were selected to investigate the effects on part characteristics using a Box-Behnken experimental design. Through this method, each parameter was evaluated between 600 W to 800 W laser power, 6 mm/s to 14 mm/s feedrate and 0.2 mm to 0.4 mm layer thickness. All remaining parameters were fixed using argon to provide an inert atmosphere, 8.8 g/min powder feeding rate and 1.5 mm spot diameter. The method was used to test the manufacture of thin-wall cylindrical specimens with 10 mm in height and 75 mm in diameter. Fabricated AISI316L samples were evaluated regarding the dimensional and geometrical characteristics. It was observed that higher energy input density during the laser additive manufacturing implies lower geometric precision. Feedrate and layer thickness has the highest impact on both the wall thickness and vertical accuracy. Given the inability to produce parts with an acceptable final surface, the process finds great applicability when complemented with additional finishing technologies.

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Optimization of Thin Walls with Sharp Corners in SS316L and IN718 Alloys Manufactured with Laser Metal Deposition

Cited by 9 publications

References 14 publications

Uplifting the study of the inline inspection technique on the buckling pipelines in pipeline integrity management strategy

Uplifting the study of the inline inspection technique on the buckling pipelines in pipeline integrity management strategy

Design and Qualification of an Additively Manufactured Manifold for Aircraft Landing Gears Applications

Influence of Process Parameters in LMD for Geometrical Accuracy and Thin Geometry with AISI316L

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