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Wire Arc Additive Manufacturing of Aluminum Foams Using TiH2-Laced Welding Wires
Marcel Köhler1, Alexander Nikitin2, Peter Sonnenfeld1
1Institute of Materials and Joining Technology, Otto-von-Guericke-University Magdeburg, 39106 Magdeburg, Germany.
Materials (Basel, Switzerland)
|July 13, 2024
Summary
Researchers developed a new Wire Arc Additive Manufacturing (WAAM) technology to create aluminum foam components. This innovation uses specialized welding wires with a foaming agent for efficient, complex part production in aerospace and automotive sectors.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Additive Manufacturing
Background:
- Aluminum foam composites offer desirable properties like low density and high energy absorption, making them valuable for aerospace and automotive applications.
- Additive manufacturing, particularly Direct Energy Deposition (DED) methods like Wire Arc Additive Manufacturing (WAAM), allows for complex geometries and near-net-shape production without traditional tooling.
- Existing WAAM processes are effective for solid metal parts, but producing foamed structures requires specialized material development.
Purpose of the Study:
- To present a novel technology for fabricating aluminum foam structures utilizing WAAM.
- To develop specialized welding wires containing a foaming agent (TiH2) suitable for WAAM processes.
- To demonstrate the processing of these foamed aluminum structures using Metal Inert Gas (MIG) welding technology.
Main Methods:
- Development of composite welding wires incorporating titanium hydride (TiH2) as a foaming agent.
- Utilizing Wire Arc Additive Manufacturing (WAAM) with Metal Inert Gas (MIG) welding for material deposition.
- Characterization of the resulting foamed metal structures produced by the developed WAAM process.
Main Results:
- Successful fabrication of aluminum foam structures using the developed WAAM technology.
- Demonstration of controlled foaming within the weld metal through the addition of TiH2.
- Achieved near-net-shape components with complex geometries suitable for industrial applications.
Conclusions:
- The developed WAAM technology enables the production of aluminum foam components with potential for widespread use in demanding industries.
- The specialized welding wires and MIG welding process offer a viable route for additive manufacturing of lightweight, high-performance foamed aluminum parts.
- This advancement in WAAM technology opens new possibilities for designing and manufacturing advanced composite materials.
