Powder Bed Fusion (PBF) techniques constitute a family of Additive Manufacturing (AM) processes, which are characterised by high design flexibility and no tooling requirement. This makes PBF techniques attractive to many modern manufacturing sectors (e.g. aerospace, defence, energy and automotive) where some materials, such as Nickel-based superalloys, cannot be easily processed using conventional subtractive techniques. Nickel-based superalloys are crucial materials in modern engineering and underpin the performance of many advanced mechanical systems. Their physical properties (high mechanical integrity at high temperature) make them difficult to process via traditional techniques. Consequently, manufacture of nickel-based superalloys using PBF platforms has attracted significant attention. To permit a wider application, a deep understanding of their mechanical behaviour and relation to process needs to be achieved. The motivation for this paper is to provide a comprehensive review of the mechanical properties of PBF nickel-based superalloys and how process parameters affect these, and to aid practitioners in identifying the shortcomings and the opportunities in this field. Therefore, this paper aims to review research contributions regarding the microstructure and mechanical properties of nickel-based superalloys, manufactured using the two principle PBF techniques: Laser Powder Bed Fusion (LPBF) and Electron Beam Melting (EBM). The ‘target’ microstructures are introduced alongside the characteristics of those produced by PBF process, followed by an overview of the most used building processes, as well as build quality inspection techniques. A comprehensive evaluation of the mechanical properties, including tensile strength, hardness, shear strength, fatigue resistance, creep resistance and fracture toughness of PBF nickel-based superalloys are analysed. This work concludes with summary tables for data published on these properties serving as a quick reference to scholars. Characteristic process factors influencing functional performance are also discussed and compared throughout for the purpose of identifying research opportunities and directing the research community toward the end goal of achieving part integrity that extends beyond static components only.

粉末床熔合（PBF）技术构成了增材制造（AM）工艺系列，其特点是设计灵活性高且不需要工具。这使得PBF技术对许多现代制造行业（例如，航空航天，国防，能源和汽车行业）具有吸引力，在这些领域中，某些材料（例如镍基超级合金）无法使用常规减薄技术轻松加工。镍基超级合金是现代工程中的关键材料，并支撑了许多先进机械系统的性能。它们的物理特性（高温下的高机械完整性）使其很难通过传统技术进行加工。因此，使用PBF平台制造镍基高温合金引起了极大的关注。为了允许更广泛的应用，需要对它们的机械行为以及与过程的关系有深入的了解。本文的目的是全面回顾PBF镍基高温合金的机械性能以及工艺参数如何影响这些性能，并帮助从业人员识别该领域的不足和机遇。因此，本文旨在回顾有关使用两种主要的PBF技术制造的镍基高温合金的微观结构和力学性能的研究贡献：激光粉末床熔合（LPBF）和电子束熔化（EBM）。介绍了“目标”微结构以及PBF工艺产生的微结构的特征，然后概述了最常用的建筑过程以及建筑质量检查技术。分析了PBF镍基高温合金的力学性能，包括拉伸强度，硬度，剪切强度，抗疲劳性，抗蠕变性和断裂韧性，对其进行了综合评估。这项工作的最后是汇总表，这些表汇总了有关这些属性的数据，可作为学者的快速参考。还在整个过程中讨论并比较了影响功能性能的特征过程因素，以识别研究机会，并指导研究团体实现最终目标，即实现不仅限于静态组件的零件完整性。这项工作的最后是汇总表，这些表汇总了有关这些属性的数据，可作为学者的快速参考。还在整个过程中讨论并比较了影响功能性能的特征过程因素，以识别研究机会，并指导研究团体实现最终目标，即实现不仅限于静态组件的零件完整性。这项工作的最后是汇总表，这些表汇总了有关这些属性的数据，可作为学者的快速参考。还在整个过程中讨论并比较了影响功能性能的特征过程因素，以识别研究机会，并指导研究团体实现最终目标，即实现不仅限于静态组件的零件完整性。