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Selection of Parameters for Optimized WAAM Structures for Civil Engineering Applications.
Saham Sadat Sharifi1, Sebastian Fritsche1, Christoph Holzinger2
1Institute of Materials Science, Joining and Forming at Graz University of Technology, Kopernikusgasse 24/I, 8010 Graz, Austria.
Materials (Basel, Switzerland)
|July 14, 2023
Summary
Wire arc additive manufacturing (WAAM) with Cold Metal Transfer (CMT) welding offers resource-saving fabrication of steel components. This study explores geometric possibilities, process parameters, and joint properties for optimized additive manufacturing.
Area of Science:
- Materials Science and Engineering
- Manufacturing Technology
- Welding Engineering
Background:
- Additive manufacturing offers resource-saving alternatives to subtractive methods.
- Wire Arc Additive Manufacturing (WAAM) with Cold Metal Transfer (CMT) is explored for steel component fabrication.
- Reinforcing existing steel components through WAAM is a key application.
Purpose of the Study:
- To investigate the geometric capabilities of the CMT-WAAM process.
- To analyze the influence of process parameters on seam shape and build-up rate.
- To evaluate the microstructure and joint properties of manufactured steel components.
Main Methods:
- Metallography and hardness testing were employed for microstructure evaluation.
- Process parameters like wire feed speed, travel speed, and torch inclination were varied.
- Microhardness analysis was used to determine joint properties.
Main Results:
- The study presents the influence of various parameters on seam shape and build-up rate.
- Print strategies were developed based on initial findings.
- Recommended process parameter sets optimize energy input, weld integrity, and hardness distribution.
- Steel quality equivalents were defined according to ÖNORM EN ISO 18265.
Conclusions:
- CMT-WAAM provides significant geometric possibilities for steel component manufacturing.
- Optimized process parameters are crucial for achieving desired material properties and component integrity.
- The research provides a foundation for developing tailored print strategies and material characterization in additive manufacturing.
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