Abstract
Material-structure-property integration is a promising development trend of additive manufacturing (AM). Nowadays, the material-property (M-P) relationships and structure-property (S-P) relationships of AM components have been extensively investigated. However, it is still unclear whether there is a relationship between M-P and S-P. Microscale cellular structure (ICS) is a typical microstructure in laser powder bed fusion (LPBF) processed metals, while macroscale cellular structure (ACS) is often fabricated by LPBF and are widely applied in industrial fields. Here, the solid material of AlSi10Mg alloy and ACS inspired by the ICS of AlSi10Mg were fabricated by LPBF. The scanning electron microscope (SEM) and electron backscatter diffraction (EBSD) analysis revealed that reducing the laser power from 400 W to 300 W would increase the mean diameter of ICS from 0.4 μm to 0.9 μm, but the grain size remained almost unchanged. The micro-CT results indicated that the LPBF fabricated ACS had high relative density and dimensional accuracy. Through Hall-Petch equation, the relationship between M-P of AlSi10Mg alloy and S-P of cellular structure was established. The present investigations provide a way to predict microstructure properties from the macrostructure properties, and vice versa, which will facilitate the material-structure-property integration of AM technology.
Published Version
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