研究目的
Investigating the structure and phase composition of in-situ Al-Si composites produced by micro LMD process with different parameters sets and the influence of cladding parameters on Al-Si composites structure.
研究成果
The study concluded that micro LMD process with different parameters sets significantly influences the structure and mechanical properties of Al-Si composites. High supersaturation of α-phase and high structure dispersion degree contribute to the high level of mechanical properties. The composites also exhibit high temperature stability up to 300°C.
研究不足
The study focuses on the microstructural and phase composition analysis of Al-Si composites produced by micro LMD. The limitations include the specific parameters sets used and the focus on AlSi30 alloy, which may not cover all possible variations in composite materials.
1：Experimental Design and Method Selection:
The study utilized micro LMD process with different parameters sets to produce in-situ Al-Si composites. The structure and phase composition were analyzed using fine structure X-ray analysis.
2：Sample Selection and Data Sources:
AlSi30 powders were used as initial material for micro LMD. The samples' cross-sections microstructure was observed under an optical microscope.
3：List of Experimental Equipment and Materials:
Equipment included an optical microscope Olympus GX51, HP Mikromat for microhardness investigation, Sigmascope SMP10 for electrical conductivity measurement, and diffractometer ARL X’TRA for X-ray diffraction.
4：Experimental Procedures and Operational Workflow:
The micro LMD parameters sets were determined through a complete full factorial experiment. The samples were annealed in air for 2 hours at different temperatures to investigate the temperature action on the sample structure and properties.
5：Data Analysis Methods:
Phase analysis was performed by X-ray diffraction using the Crystallographica Search-Match 3.10 program and the ICDD PDF-2 standard X-ray film database. The quantitative phase composition and instrumental line broadening were determined using the SIROQUANT V3 program.
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