研究目的
The purpose of this study is to investigate the metallurgical bonding and mechanical properties of a hybrid-part fabricated through selective laser melting of AlSi10Mg on an Al-Cu-Ni-Fe-Mg cast alloy substrate, to prove the reliability of additive concepts for aluminum molding designs.
研究成果
The study successfully fabricated a hybrid-part by selective laser melting of AlSi10Mg on an Al-Cu-Ni-Fe-Mg cast alloy substrate, achieving a sound metallurgical bonding at the interface. The SLM-AlSi10Mg side exhibited superior mechanical properties due to its finer and hierarchical microstructure. The findings demonstrate the potential of SLM for fabricating hybrid components with tailored properties for specific applications.
研究不足
The study focuses on the microstructural and mechanical properties of the hybrid-part, but the long-term performance under operational conditions, such as thermal cycling and corrosion, is not investigated. Additionally, the study uses specific SLM process parameters recommended by EOS GmbH, which may not be optimized for all potential applications.
1：Experimental Design and Method Selection
The study involved the fabrication of a hybrid-part by selective laser melting (SLM) of AlSi10Mg powder on an Al-Cu-Ni-Fe-Mg cast alloy substrate. The microstructure and interface of the hybrid-part were investigated using multi-scale characterization techniques including optical microscopy (OM), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). Mechanical properties were evaluated using Vickers microhardness measurements, nanoindentation, and quasi-static uniaxial tensile tests.
2：Sample Selection and Data Sources
The substrate material was a commercial Al-Cu-Ni-Fe-Mg cast alloy, and the AlSi10Mg powder was provided by EOS GmbH with a size distribution of 10-45 μm. The hybrid-part was fabricated using an EOS M290 additive machine equipped with a 400W Yb-fiber laser.
3：List of Experimental Equipment and Materials
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4：Experimental Procedures and Operational Workflow
The AlSi10Mg part was deposited on top of the substrate cast alloy using stripe scanning strategy by rotating the laser beam 67° between the successive layers. The SLM process parameters were those recommended by EOS GmbH to achieve the least porosity and the best mechanical performance. Microstructural characterization was performed using OM, SEM, EBSD, and TEM. Mechanical properties were evaluated using microhardness measurements, nanoindentation, and tensile tests.
5：Data Analysis Methods
Microstructural characteristics including cell size and grain size measurements were performed using SEM and TEM techniques. Mechanical properties were analyzed based on microhardness measurements, nanoindentation, and tensile test results.
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