Impact behavior of AlSi10Mg porous structures with varying single-unit cell rotation angles fabricated via laser powder bed fusion

作者：Xuezheng Yue, Hulin Tang, Songhao Lu, Rusheng Zhao, Bo-Young Hur, Shiyue Guo, Jincheng Wang · 发表于：Materials Science in Additive Manufacturing · 年份：2025 · DOI：10.36922/msam025130019 · 被引用次数：6 · 研究领域：Additive Manufacturing and 3D Printing Technologies、Additive Manufacturing Materials and Processes、Cellular and Composite Structures

Porous structures offer lightweight design and geometric flexibility for applications in transportation and bioengineering. Additive manufacturing, particularly laser powder bed fusion (LPBF), enables the fabrication of complex porous architectures. However, achieving an optimal balance between weight reduction and mechanical performance remains challenging. Therefore, further investigation into the design of porous structures is essential. This study explores the dynamic mechanical behavior of porous AlSi10Mg structures designed using a parametric modeling approach and the Voronoi tessellation algorithm. The structures, fabricated via LPBF, feature varying single-unit cell rotation angles and porosities. The dynamic mechanical behaviors were experimentally investigated under different impact energies to assess the influence of single-unit cell rotation on impact properties, complemented by finite element analysis simulations. The results indicate that a slight decrease in porosity by 10% (from 90% to 80%) significantly enhances energy absorption and impact resistance while maintaining lightweight features. Significant variations are observed in peak contact force and energy absorption trends. The results demonstrate that single-unit cell rotation improves impact resistance in certain cases, leading to significant enhancements in energy absorption, specific energy absorption, and specific strength, which increased by approximately 18.9% (P90), 17.1% (P90), and 79.5% (P80), re...