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Mechanical properties of additively manufactured variable lattice structures of Ti6Al4V

机译：Ti6Al4V的含有瘾制造的变形晶格结构的力学性能

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摘要

Engineered micro- and macro-structures via additive manufacturing (AM) or 3D-Printing can create structurally varying properties in parts that are difficult to achieve via traditional manufacturing methods. Herein we have utilized powder bed fusion-based selective laser melting (SLM) to fabricate variable lattice structures of Ti6Al4V with uniquely designed unit cell configurations to alter the compressive performance. Five different configurations were designed based on two natural crystal structures - hexagonal closed packed (HCP) and body-centered cubic (BCC). Under compressive loading, as much as 74% difference was observed in compressive strength and 71% variation in elastic modulus, with all samples having porosities in a similar range of 53-65%, indicating the influence of macro-lattice designs alone on mechanical properties. Finite element analysis (FEA) and failure analysis of the fracture surfaces aided our understanding of how configurational effects and unit cell design influence these samples' mechanical properties. Our work highlights the ability to leverage advanced manufacturing techniques to tailor the structural performance of multifunctional components.
机译：通过添加剂制造（AM）或3D印刷的设计微型和宏观结构可以在难以通过传统制造方法难以实现的部件中产生结构变化的性质。在此，我们利用了基于粉末融合的选择性激光熔化（SLM），以制造Ti6Al4V的可变晶格结构，具有独特设计的单元电池配置来改变压缩性能。根据两个天然晶体结构设计了五种不同的配置 - 六角形封闭式包装（HCP）和身体中心的立方（BCC）。在压缩负载下，在压缩强度下观察到多达74％的差异，弹性模量的71％变化，所有样品的孔隙率在53-65％的范围内，表明宏观晶格设计的影响单独对机械性能的影响。裂缝表面的有限元分析（FEA）和故障分析帮助我们了解构造效应和单位细胞设计如何影响这些样本的机械性能。我们的工作突出了利用先进制造技术来定制多功能部件的结构性能的能力。

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  • 来源
    《Materials Science and Engineering》 |2021年第30期|140925.1-140925.9|共9页
  • 作者

    Kellen D. Traxel; Cory Groden; Jesus Valladares; Amit Bandyopadhyay;

  • 作者单位

    W. M. Keck Biomedical Materials Research Laboratory School of Mechanical and Materials Engineering Washington State University Pullman WA 99164 USA;

    W. M. Keck Biomedical Materials Research Laboratory School of Mechanical and Materials Engineering Washington State University Pullman WA 99164 USA;

    W. M. Keck Biomedical Materials Research Laboratory School of Mechanical and Materials Engineering Washington State University Pullman WA 99164 USA;

    W. M. Keck Biomedical Materials Research Laboratory School of Mechanical and Materials Engineering Washington State University Pullman WA 99164 USA;

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  • 正文语种 eng
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  • 关键词

    Powder bed fusion; Mechanical properties; Lattice structures; Ti6A14V; Selective laser melting;

    机译：粉床融合;机械性能;格子结构;Ti6a14v;选择性激光熔化;

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