On the relationship between cutting forces and anisotropy features in the milling of LPBF Inconel 718 for near net shape parts

Pérez-Ruiz, José David; Lacalle, Luís Norberto López de; Urbikaín, Gorka; Pereira, Octavio; Martı́nez, Silvia; Bris, Jorge

doi:10.1016/j.ijmachtools.2021.103801

Cited by 117 publications

(53 citation statements)

References 66 publications

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“…Wrought commercial stainless-steel sheets are included for comparison purposes and the overall results show that the proposed analytical model can be successfully used to characterize plastic deformation and failure by the tearing in hybrid additive manufacturing of stiffening grooves. Microstructure observations and anisotropy justify the differences in the mechanical response of the additively deposited and wrought commercial stainless-steel sheets, in agreement with previous observations of the authors in the same material [14] and of other authors in different materials [15].…”

Section: Introductionsupporting

confidence: 90%

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Hybrid Manufacturing of Stiffening Grooves in Additive Deposited Thin Parts

Cristino

Pragana

Bragança

et al. 2021

JMMP

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This paper is focused on the hybridization of additive manufacturing with single-point incremental forming to produce stiffening grooves in thin metal parts. An analytical model built upon in-plane stretching of a membrane is provided to determine the tool force as a function of the required groove depth and to estimate the maximum allowable groove depth that can be formed without tearing. The results for additively deposited stainless-steel sheets show that the proposed analytical model can replicate incremental plastic deformation of the stiffening grooves in good agreement with experimental observations and measurements. Anisotropy and lower formability caused by the dendritic-based microstructure of the additively deposited stainless-steel sheets justifies the reason why the maximum allowable depth of the stiffening grooves is approximately 27% smaller than that obtained for the wrought commercial sheets of the same material that are used for comparison purposes.

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Section: Introductionsupporting

confidence: 90%

“…This last result allows for obtaining the maximum allowable depth H max by searching for the groove geometry that provides a force per unit of length T φ (15) equal to the critical value C crit at the onset of failure by fracture (17).…”

Section: Maximum Allowable Depthmentioning

confidence: 99%

Hybrid Manufacturing of Stiffening Grooves in Additive Deposited Thin Parts

Cristino

Pragana

Bragança

et al. 2021

JMMP

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“…The grain growth direction shows a clear difference between the surface and the bottom of the clad layer. This is because the grains grow along the approximate thermal gradient direction, and the thermal gradient and solidification rate are the most significant factors governing the grain growth [18]. Similarly, the Co-based cladding layer with a Ni-based transition layer has a similar grain growth direction.…”

Section: Microstructure and Phase Compositionmentioning

confidence: 99%

Research on Laser Cladding Co-Based Alloy on the Surface of Vermicular Graphite Cast Iron

Sun

Cai

et al. 2021

Coatings

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To further improve the hardness of the laser cladding layer on the surface of the vermicular graphite cast iron, the structural parameters of the laser cladding Co-base were designed and optimized, and the properties of the clad layer were evaluated using optical microscopy (OM), scanning electron microscopy (SEM), energy spectroscopy (EDS), X-ray diffractometer (XRD), electrochemical workstation, and friction wear equipment. The results show that the average hardness of the molten layer of Ni and Co-based composite cladding layer is 504 HV0.5, which is 0.64 times that of the Co-based cladding layer due to the combined factors of Ni-Cr-Fe equivalent to the dilution of the Ni-based cladding layer to the Co-based cladding layer. Due to the potential difference of the Ni, Cr, and Co elements on the surface of the cladding layer, the self-corrosion potential of the Ni and Co-based composite cladding layer is 1.08 times that of the Co-based cladding layer, and the self-corrosion current density is 0.51 times. Laser cladding Co-based cladding layer has high corrosion resistance. Under the influence of plastic deformation and oxidative wear of the cladding layer of the Ni and Co-based composite cladding layer, the wear amount of the cladding layer of the Ni and Co-based composite cladding layer is less.

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“…LPBF, as additive manufacturing technology, was able to easily fabricate bone tissue engineering scaffold with a complicated pore structure and personalized outer shape, thus meeting the application requirement for different patients ( Gao et al, 2021a ; Shuai et al, 2021b ; Yang et al, 2021 ). Moreover, it utilized high-energy laser beam as a heat source, which could deal with a wide range of material systems, including metals, ceramics, polymers, and their composites ( Pérez-Ruiz et al, 2021 ; Wang et al, 2021 ). Herein, the microstructure feature, degradation performance, and corrosion behavior for the Fe/CaCl 2 composite were systematically studied.…”

Section: Introductionmentioning

confidence: 99%

Laser Additively Manufactured Iron-Based Biocomposite: Microstructure, Degradation, and In Vitro Cell Behavior

Yang

Cai

Yang

et al. 2021

Front. Bioeng. Biotechnol.

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A too slow degradation of iron (Fe) limits its orthopedic application. In this study, calcium chloride (CaCl2) was incorporated into a Fe-based biocomposite fabricated by laser additive manufacturing, with an aim to accelerate the degradation. It was found that CaCl2 with strong water absorptivity improved the hydrophilicity of the Fe matrix and thereby promoted the invasion of corrosive solution. On the other hand, CaCl2 could rapidly dissolve once contacting the solution and release massive chloride ion. Interestingly, the local high concentration of chloride ion effectively destroyed the corrosion product layer due to its strong erosion ability. As a result, the corrosion product layer covered on the Fe/CaCl2 matrix exhibited an extremely porous structure, thus exhibiting a significantly reduced corrosion resistance. Besides, in vivo cell testing proved that the Fe/CaCl2 biocomposite also showed favorable cytocompatibility.

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On the relationship between cutting forces and anisotropy features in the milling of LPBF Inconel 718 for near net shape parts

Cited by 117 publications

References 66 publications

Hybrid Manufacturing of Stiffening Grooves in Additive Deposited Thin Parts

Hybrid Manufacturing of Stiffening Grooves in Additive Deposited Thin Parts

Research on Laser Cladding Co-Based Alloy on the Surface of Vermicular Graphite Cast Iron

Laser Additively Manufactured Iron-Based Biocomposite: Microstructure, Degradation, and In Vitro Cell Behavior

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