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首页> 外文期刊>Journal of engineering materials and technology >On Mechanical Properties of Cellular Steel Solids With Shell-Like Periodic Architectures Fabricated by Selective Laser Sintering
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On Mechanical Properties of Cellular Steel Solids With Shell-Like Periodic Architectures Fabricated by Selective Laser Sintering

机译：选择性激光烧结的壳状周期结构多孔钢固体力学性能研究

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摘要

Historically, the approach in material selection was to find the proper material that serves a specific application. Recently, a new approach is implemented such that materials are being architected and topologically tailored to deliver a specific functionality. Periodic cellular materials are increasingly gaining interest due to their tunable structure-related properties. However, the concept of structure-property relationship is not fully employed due to limitations in manufacturing capabilities. Nowadays, additive manufacturing (AM) techniques are facilitating the fabrication of complex structures with high control over the topology. In this work, the mechanical properties of additively manufactured periodic metallic cellular materials are investigated. The presented cellular materials comprise a shell-like topology based on the mathematically known triply periodic minimal surfaces (TPMS). Maraging steel samples with different topologies and relative densities have been fabricated using the powder bed fusion selective laser sintering (SLS) technique, and three-dimensional printing quality was assessed by means of electron microscopy. Samples were tested in compression and the compressive mechanical properties have been deduced. Effects of changing layer thickness and postprocessing such as heat treatment are discussed. Results showed that the diamond TPMS lattice has shown superior mechanical properties among the examined topologies.
机译：从历史上看，材料选择的方法是找到适合特定应用的合适材料。最近，实施了一种新方法，以便对材料进行架构和拓扑调整以提供特定功能。周期性的蜂窝材料由于其与结构可调的特性而越来越受到关注。然而，由于制造能力的限制，结构-特性关系的概念没有被完全采用。如今，增材制造（AM）技术正在促进对拓扑结构具有高度控制的复杂结构的制造。在这项工作中，研究了增材制造的周期性金属多孔材料的机械性能。提出的细胞材料包括基于数学上已知的三重周期性最小表面（TPMS）的壳状拓扑。使用粉末床熔融选择性激光烧结（SLS）技术制备了具有不同拓扑结构和相对密度的马氏体时效钢样品，并通过电子显微镜评估了三维打印质量。对样品进行了压缩测试，并得出了压缩机械性能。讨论了改变层厚度和后处理（如热处理）的效果。结果表明，在所检查的拓扑中，金刚石TPMS晶格显示出优异的机械性能。

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