研究目的
Investigating the effects of platform pre-heating and thermal-treatment strategies on properties of AlSi10Mg alloy processed by selective laser melting.
研究成果
The study demonstrated that direct aging of cold platform-printed AlSi10Mg alloy yields the best mechanical properties, while hot platform processing leads to overaging. Standard T6 treatment results in higher ductility but lower strength.
研究不足
The study focused on AlSi10Mg alloy and may not be directly applicable to other materials. The effects of in situ aging during hot platform processing could vary with part size and geometry.
1：Experimental Design and Method Selection
The study involved processing AlSi10Mg alloy by selective laser melting (SLM) using both hot- and cold-build platforms to investigate the effects of pre-heating and post-process thermal treatments on microstructure and mechanical properties.
2：Sample Selection and Data Sources
Samples were produced using an EOS M290 SLM system with gas-atomized AlSi10Mg powders. Two sets of samples were prepared: one on a preheated build platform at 160°C (HP) and another without preheating (CP).
3：List of Experimental Equipment and Materials
EOS M290 SLM system, SEM (EVO 50, Zeiss, Germany), optical microscope (Leitz Aristomet, Germany), DSC, XRD at ID22 beamline of ESRF, MTS Alliance RT/100 universal testing frame.
4：Experimental Procedures and Operational Workflow
Microstructural analyses, DSC, high-resolution XRD, tensile tests were conducted to evaluate the effects of different thermal treatments on the alloy's properties.
5：Data Analysis Methods
Microstructural analysis, DSC curves analysis, XRD data analysis using Rietveld refinements, tensile test data analysis.
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EOS M290 SLM system
M290
EOS
Selective laser melting of AlSi10Mg alloy samples.
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SEM
EVO 50
Zeiss
Microstructural analysis of AlSi10Mg alloy samples.
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Optical Microscope
Aristomet
Leitz
Microstructural analysis of AlSi10Mg alloy samples.
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DSC
Thermal analysis of AlSi10Mg alloy samples.
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XRD
ID22 beamline
ESRF
High-resolution diffraction analysis of AlSi10Mg alloy samples.
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Universal Testing Frame
Alliance RT/100
MTS
Tensile testing of AlSi10Mg alloy samples.
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