Hybrid Joining Through Additive Manufacturing

Gibson, Thao; Tandon, G. P.; Hicks, Adam; Middendorf, J. R.; Laycock, Bryce; Simon, Gerard

doi:10.1007/978-3-319-22443-5_11

Cited by 1 publication

(2 citation statements)

References 3 publications

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“…However, post-treatment strategies for pore reduction in LPBF volumes, such as hot isostatic pressing, require high temperatures of 350–500 °C [ 47 ], which would lead to the decomposition of the thermally sensitive polymer matrix in the hybrid composite. An increase in the bulk density of AlSi12 volumes could be enabled by an increase in VED at a certain distance from the substrate, which was demonstrated by Gibson et al for LPBF of Ti6Al4V on carbon fiber woven fabrics [ 22 ]. Based on the current fracture mechanism, decreased densities < 80% have no critical impact on the bond strength of the hybrid joint.…”

Section: Discussionmentioning

confidence: 98%

“…Therefore, Gibson et al used Ni-coated carbon fiber woven fabric, on which they built Ti6Al4V layers via LPBF. A cross-section analysis revealed that the Ti6Al4V melt penetrated about half of the fabric thickness, thereby forming a metal–matrix composite [ 22 ]. In the following step, the non-filled fabric side was infiltrated with polymer resin to obtain a hybrid metal/CFRP composite with a functionally graded interface [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Joining of Aluminum and CFRP via Laser Powder Bed Fusion: Influence of Experimental Set-Up and Laser Processing on Microstructure and Mechanical Properties

Nester,

Meinhard,

Schanz

et al. 2023

Polymers

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Additive-manufacturing-based joining methods enable tailored or even functionalized joints and allow for hybridization at small scales. The current study explored an innovative joining method for aluminum cast alloys (AlSi12) with thermoset carbon-fiber-reinforced polymers (CFRPs) via laser powder bed fusion (LPBF). The direct build-up of AlSi12 on a CFRP substrate proved to be challenging due to the dissimilar thermal properties of the considered materials, which led to substrate damage and low joint adhesion. These effects could be overcome by introducing an AlSi12 foil as an interlayer between the two joining partners, acting as a thermal barrier and further improving the AlSi12 melt wettability of the substrate. Within LPBF, the energy input in the form of volumetric laser energy density influenced both the porosity of the fused layers and the formation of thermally induced stresses due to the high cooling rates and different thermal expansion properties of the materials. While the AlSi12 volume density increased with a higher laser energy input, simultaneously increasing thermal stresses caused the debonding and deformation of the AlSi12 foil. However, within a narrow processing window of laser parameters, the samples achieved remarkably high shear strengths of τ > 20 MPa, comparable to those of conventional joining methods.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%