研究目的
Investigating the effect of different aluminum substrates (AlSi10Mg, 6061, and 7050) on the molten pool characteristics, thermal behaviors, microstructure, silicon distribution, and microhardness in selective laser melting (SLM) of AlSi10Mg thin wall parts.
研究成果
The study concludes that the substrate material significantly affects the thermal behavior, molten pool characteristics, microstructure, and microhardness of SLMed AlSi10Mg thin wall parts, especially in the initial layers. However, these effects diminish as the number of deposited layers increases, leading to similar characteristics across different substrates after a certain number of layers. This finding has important implications for selecting substrate materials in SLM processes to optimize performance and reduce costs.
研究不足
The study focuses on the influence of substrate materials on SLM of thin wall parts but does not explore the effects of other process parameters such as laser power, scan speed, and hatch spacing in depth. The finite element model assumes homogeneity and continuous medium for the powder bed, which may not fully capture the complexity of the SLM process.
1：Experimental Design and Method Selection:
The study combines finite element modeling and ex situ characterization to investigate the influence of different substrates on SLM of thin wall parts. A finite element model is proposed to simulate the thermal behaviors of thin wall parts with different substrates.
2：Sample Selection and Data Sources:
Thin wall parts are built from the 1st to the 40th layer using AlSi10Mg powder on three different substrates (AlSi10Mg, 6061, and 7050).
3：0).
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A self-developed SLM equipment with a fiber laser (λ = 1.064 μm, continuous wave, maximum output power of 200 W), an automatic powder delivery system, and a computer system for process control. Gas-atomized AlSi10Mg powder is used.
4：064 μm, continuous wave, maximum output power of 200 W), an automatic powder delivery system, and a computer system for process control. Gas-atomized AlSi10Mg powder is used.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Different layers of thin wall parts are manufactured and their molten pool boundaries are measured. The samples are cut, ground, polished, and etched for metallography. The cross-sectional view of the molten pool is characterized using a Nikon Epiphot 300 optical microscope.
5：Data Analysis Methods:
The thermal behaviors, molten pool characteristics, microstructure, silicon element content, and mechanical properties are analyzed. The molten pool dimensions and shape coefficients are calculated.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
