Hybrid Wire-Arc Additive Manufacturing of Conformal Cooling Channels: A Feasibility Study

Article Engineering, Mechanical

Revisiting the ring hoop test in additively manufactured metal tubes

Joao P. M. Pragana et al.

Summary: This paper focuses on the mechanical and formability characterization of wire-arc additive manufactured AISI 316-L stainless-steel tubes, using tension and ring hoop tension tests to obtain stress-strain curves and failure onset by fracture for different tube directions. The study revisits the ring hoop test to determine the appropriateness of using different specimen geometries and explores strain loading paths from plane strain to pure shear deformation conditions. Commercial AISI 316-L stainless-steel tubes are included for reference purposes.

JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN (2022)

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Article Automation & Control Systems

Integration of tube end forming in wire arc additive manufacturing: An experimental and numerical investigation

Joao P. M. Pragana et al.

Summary: The integration of tube end forming operations in metal additive manufacturing routes has the potential to fabricate customized features in additively deposited hollow parts. This paper focuses on the advantages of tube expansion with rigid tapered conical mandrels in constructing overhanging flares, showcasing their effectiveness in eliminating support structures and preventing humping. Results show that additively deposited tubes can safely withstand critical ductile damage, allowing for successful integration of tube end forming operations in metal additive manufacturing without the need for expensive hardware and complex deposition strategies.

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2021)

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Review Thermodynamics

Design and fabrication of conformal cooling channels in molds: Review and progress updates

Shaochuan Feng et al.

Summary: This study comprehensively evaluates the design, manufacturing, and applications of conformal cooling (CC) systems, introducing key design parameters and eight classification types of CC channels. CC channels can significantly improve part quality, reduce production costs, and be applied to advanced products requiring high-performance self-cooling.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Review Engineering, Industrial

Hybrid metal additive manufacturing: A state-of-the-art review

J. P. M. Pragana et al.

Summary: This paper discusses the early developments and working principles of additive manufacturing of polymers, as well as the extension to metals with identification and characterization of two most common technologies, and recent developments in hybrid metal additive manufacturing. It emphasizes the importance of combining additive manufacturing with traditional manufacturing processes to overcome limitations and promote new applications.

ADVANCES IN INDUSTRIAL AND MANUFACTURING ENGINEERING (2021)

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Article Engineering, Manufacturing