增材制造周期细胞结构的力学性能和设计变化

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL
Derek G. Spear, A. Palazotto, R. Kemnitz
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引用次数: 7

摘要

制造技术的进步导致了材料选择新方法的发展,在这种方法中,可以创建建筑设计来实现特定的机械目标。由于能够通过调整拓扑结构、表面厚度、细胞大小和细胞密度来调整其机械响应,细胞晶格结构一直处于这一运动的前沿。在这项工作中,主要通过拓扑结构和表面厚度参数来评估和比较增材制造的周期细胞晶格的力学性能。评估的晶格是基于三周期最小表面(TPMS),包括在基础TPMS设计上的新变化,这些设计以前没有经过测试。这些晶格是由Inconel 718 (IN718)通过选择性激光熔化(SLM)工艺制成的。试样在单轴压缩下进行了测试,并确定了由此产生的力学性能。进一步讨论了晶格的制造质量和变形行为。结果表明,金刚石TPMS晶格具有较好的力学性能。此外,除了原始TPMS晶格外,基本TPMS设计表现出优于其衍生晶格设计的力学性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mechanical Properties of Additively Manufactured Periodic Cellular Structures and Design Variations
Advances in manufacturing technologies have led to the development of a new approach to material selection, in which architectured designs can be created to achieve a specific mechanical objective. Cellular lattice structures have been at the forefront of this movement due to the ability to tailor their mechanical response through tuning of the topology, surface thickness, cell size, and cell density. In this work, the mechanical properties of additively manufactured periodic cellular lattices are evaluated and compared, primarily through the topology and surface thickness parameters. The evaluated lattices were based upon triply periodic minimal surfaces (TPMS), including novel variations on the base TPMS designs, which have not been tested previously. These lattices were fabricated out of Inconel 718 (IN718) through the selective laser melting (SLM) process. Specimens were tested under uniaxial compression, and the resultant mechanical properties were determined. Further discussion of the fabrication quality and deformation behavior of the lattices is provided. Results of this work indicate that the Diamond TPMS lattice has superior mechanical properties to the other lattices tested. Additionally, with the exception of the primitive TPMS lattice, the base TPMS designs exhibited superior mechanical performance to their derivative lattice designs.
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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