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Fiber Orientation Effects in Fused Filament Fabrication of Air-Cooled Heat Exchangers

Journal Article · · JOM. Journal of the Minerals, Metals & Materials Society
 [1];  [2];  [2];  [2];  [2]
  1. Univ. of Wisconsin, Madison, WI (United States); University of Wisconsin-Madison Department of Mechanical Engineering
  2. Univ. of Wisconsin, Madison, WI (United States)
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Fused filament fabrication (FFF) is a type of additive manufacturing based on material extrusion that has long been considered a prototyping technology. However, the right application of material, process, and product can be used for manufacturing of end-use products, such as air-cooled heat exchangers made by adding fillers to the base polymer, enhancing the thermal conductivity. Fiber fillers lead to anisotropic thermal conductivity, which is governed by the process-induced fiber orientation. This article presents an experimental study on the microstructure-property relationship for carbon fiber-filled polyamide used in FFF. Furthermore, the fiber orientation is measured by micro-computed tomography, and the thermal conductivity of manufactured samples is measured. Although the thermal conductivity is raised by more than three times in the fiber orientation direction at a load of only 12 vol.%, the enhancement is low in the other directions, and this anisotropy, along with certain manufacturing restrictions, influences the final part performance.

Research Organization:
Univ. of Wisconsin-Madison, Madison, WI (United States)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
AR0000573
OSTI ID:
1462036
Journal Information:
JOM. Journal of the Minerals, Metals & Materials Society, Journal Name: JOM. Journal of the Minerals, Metals & Materials Society Journal Issue: 3 Vol. 70; ISSN 1047-4838
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (5)

Determination of the fibre orientation in composites using the structure tensor and local X-ray transform journal February 2010
Pulse Method of Measuring Thermal Diffusivity at High Temperatures journal April 1963
The Motion of Ellipsoidal Particles Immersed in a Viscous Fluid journal November 1922
The Use of Tensors to Describe and Predict Fiber Orientation in Short Fiber Composites journal November 1987
Orientation Behavior of Fibers in Concentrated Suspensions journal April 1984

Figures / Tables (4)

Figure 1(p. 2)figure Figure 1
Figure 2(p. 4)figure Figure 2
Figure 3(p. 5)figure Figure 3
Figure 4(p. 6)figure Figure 4

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Related Subjects

36 MATERIALS SCIENCE