研究目的
To investigate the directed energy deposition (DED) of wrought-like Al 5xxx AlMg alloy by Laser Engineered Net Shaping (LENS?), focusing on the transition in chemistry from an Al 5083 powder to one closer to Al 5754 in the as-deposited material, and to evaluate the microstructure, porosity, density, and mechanical behavior of the deposited material.
研究成果
The study successfully demonstrated DED of wrought-like Al 5xxx alloy by LENS?, achieving a transition in chemistry from Al 5083 to Al 5754 characteristics due to selective evaporation of Mg. The as-deposited material showed high relative density and mechanical properties meeting international standards for wrought Al 5754-O. The research provides a foundation for further exploration into AM of Al 5xxx alloys by DED.
研究不足
The study acknowledges challenges in processing high-quality structural Al alloys by DED, including high surface reflectivity and thermal conductivity of Al, selective evaporation of alloying elements, and porosity formation. The research also notes the need for further optimization of processing parameters to achieve near full density.
1：Experimental Design and Method Selection:
The study utilized Laser Engineered Net Shaping (LENS?) for DED of Al 5xxx alloy. The methodology included chemical composition analysis, density measurement by Archimedes method and μ-CT, microstructure characterization, and mechanical properties evaluation.
2：Sample Selection and Data Sources:
Al 5083 gas atomized powder was used as feedstock. Samples were deposited on an Al 5083 plate substrate under controlled conditions.
3：List of Experimental Equipment and Materials:
Equipment included a LENS? 750 machine, SEM, EBSD detector, XRD diffractometer, and Instron 5582 machine for tensile tests.
4：Experimental Procedures and Operational Workflow:
Deposition was performed under argon environment with controlled oxygen levels. Samples were sectioned, polished, and etched for microstructural investigation. Tensile samples were fabricated using wire EDM.
5：Data Analysis Methods:
Data analysis included chemical composition analysis by ICP-OES and OES, density measurement by Archimedes method and μ-CT, microstructure characterization by SEM and EBSD, and mechanical properties evaluation by tensile tests combined with DIC.
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
