研究目的
Exploring the feasibility of fabricating single-crystalline or single-crystalline-like stainless steel 316L (SS316L) with different geometries using laser powder bed fusion (LPBF) and studying their mechanical properties.
研究成果
The study demonstrated the feasibility of producing single-crystalline or single-crystalline-like SS316L components with different geometries using LPBF. The mechanical properties of these components were found to be anisotropic, correlating with their crystallographic textures. The findings provide valuable knowledge for tailoring the properties of LPBF-fabricated SS316L components for structural applications.
研究不足
The study focused on specific geometries and may not cover all possible complex components. The mechanical properties were only tested along certain crystallographic directions.
1：Experimental Design and Method Selection:
The study used laser powder bed fusion (LPBF) to fabricate SS316L with different geometries. The LPBF processes were carried out under an Ar atmosphere to avoid oxidation.
2：Sample Selection and Data Sources:
SS316L powder with a spherical morphology and a median size (D50) of 29 μm was used. Different geometries including thin struts, cubes, walls, and a simulated pump impeller were fabricated.
3：List of Experimental Equipment and Materials:
A Renishaw AM250 laser powder bed fusion system equipped with a 200 W Ytterbium fiber laser was used.
4：Experimental Procedures and Operational Workflow:
After LPBF processes, samples were prepared for analysis including mounting, grinding, and polishing. Electron backscattered diffraction (EBSD) analysis was carried out to reveal the crystallographic texture.
5：Data Analysis Methods:
The EBSD data was processed using HKL Channel 5 software. Mechanical properties were examined using uniaxial tensile testing or microhardness testing.
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