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- W4324135786 abstract "Friction-rolling additive manufacturing (FRAM) is an innovative solid-state additive manufacturing method for “non-weldable” alloys. The basic physics of this method relies on a rotating toolhead to generate severe plastic deformation and thereby deposit the material. However, the specific processes of heat generation and material flow behaviors induced by the rotating toolhead are not fully understood. In this study, a novel three-dimensional thermomechanically coupled Eulerian–Lagrangian model with a particle tracing technique was developed to analyze the transient temperature evolution and material flow behaviors during FRAM. The numerical simulation was validated based on experimental temperature measurements and the geometry of the deposit. The heat-generation process and gradual stabilization of the temperature field during the three stages of FRAM––namely, toolhead insertion, material feeding, and toolhead advancement––were successfully characterized. The results show that the toolhead simultaneously generates heat in the material strip and substrate, and more heat is generated in the shoulder and the transition zone where the toolhead shape changes from concave to convex. The presence of a single shoulder leads to an asymmetrical temperature distribution along the axial direction (Y direction) of the toolhead. The material near the toolhead flows tangentially around the toolhead, and the flow of the strip is better than that of the substrate. The particle tracing results show that the strip and substrate surfaces are well-mixed in the Z direction under the rotating action of the toolhead. The findings from this study can be applied in further fundamental investigations of the FRAM process and toolhead morphology design." @default.
- W4324135786 created "2023-03-15" @default.
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- W4324135786 date "2023-04-01" @default.
- W4324135786 modified "2023-10-17" @default.
- W4324135786 title "In-depth understanding of rotating toolhead-induced heat generation and material flow behavior in friction-rolling additive manufacturing" @default.
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- W4324135786 doi "https://doi.org/10.1016/j.addma.2023.103496" @default.
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