Technical advantages of additive manufacturing (AM) have drawn great attention over the past few years. This cost-effective manufacturing process proved its potential applications in a wide range of fields. Although AM techniques (known as 3D printing) are able to fabricate geometrically complex components, it is necessary to evaluate internal and external dimensions of the printed parts. In this context, x-ray computed tomography (CT) as a nondestructive evaluation technique has been utilized. Indeed, CT can be used for geometric analysis, defects detection, quantitative comparison, structural quantification and porosity analysis. In the current study, we present a brief review of 3D printing processes and evolution of CT technology. Moreover, applications of CT in assessment of 3D-printed components are explained in detail. Although CT has been used in academic and industrial researches, abilities of this inspection method are not yet fully documented for precision engineering applications. In this work, usage of this technique in study of printed components are categorized in four subdomains and discussed. The documented data proved that CT is an appropriate non-contact technique for technical evaluation of various printed parts. As usage of CT in assessment of printed parts is still evolving, the limitations, challenges and future perspective are outlined.

中文翻译：

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X 射线计算机断层扫描在 3D 打印部件评估中的应用

增材制造 (AM) 的技术优势在过去几年引起了极大的关注。这种具有成本效益的制造工艺证明了其在广泛领域的潜在应用。虽然 AM 技术（称为 3D 打印）能够制造几何复杂的组件，但有必要评估打印部件的内部和外部尺寸。在这种情况下，X 射线计算机断层扫描 (CT) 作为一种无损评估技术已被使用。实际上，CT 可用于几何分析、缺陷检测、定量比较、结构量化和孔隙度分析。在当前的研究中，我们简要回顾了 3D 打印过程和 CT 技术的发展。此外，详细解释了 CT 在 3D 打印组件评估中的应用。尽管 CT 已用于学术和工业研究，但这种检测方法的能力尚未完全记录在精密工程应用中。在这项工作中，该技术在印刷组件研究中的使用被分为四个子域并进行了讨论。记录数据证明 CT 是一种适用于各种印刷部件技术评估的非接触式技术。由于 CT 在打印部件评估中的使用仍在不断发展，因此概述了局限性、挑战和未来前景。记录数据证明 CT 是一种适用于各种印刷部件技术评估的非接触式技术。由于 CT 在打印部件评估中的使用仍在不断发展，因此概述了局限性、挑战和未来前景。记录数据证明 CT 是一种适用于各种印刷部件技术评估的非接触式技术。由于 CT 在打印部件评估中的使用仍在不断发展，因此概述了局限性、挑战和未来前景。