Non-destructive testing of landing gear parts made by additive manufacturing

在航空航天工业中，增材制造（AM）越来越多地用于关键部件的生产，因为它可以在重量、成本和工程性能方面获得可观的收益。然而，由于缺乏有效的无损检测（NDT）来评估制造零件的质量，对过程可重复性的有限信心减慢了其扩展速度。需要开发和优化无损检测技术，以解决增材制造零件的挑战性特性，如表面粗糙度、孔隙度、各向异性和工艺可能带来的几何复杂性。该项目的目标是与柯林斯航空航天公司合作，促进先进无损检测技术的发展，用于检测通过粉末床熔化（PBF）和电弧熔化（WAM）获得的Ti-6Al-4V钛合金起落架部件。创新的超声技术将被开发和适应三种由其几何复杂性定义的部件。开发的技术将在具有模拟缺陷的参考部件上进行验证。经过验证的技术将为每个系列零件的检验程序制定指导方针。

In the aerospace industry, additive manufacturing (AM) is increasingly adopted for the production of critical parts as it allows for considerable gains in terms of weight, cost and engineering performance. However, its expansion is slowed down by the limited confidence in the process repeatability which is strongly linked to the lack of efficient non-destructive testing (NDT) to assess the quality of manufactured parts. NDT techniques need to be developed and optimized to address the challenging specificities of AM parts such as surface roughness, porosity, anisotropy and geometric complexities rendered possible by the process. The objective of this project, in partnership with Collins Aerospace, is to contribute to the development of advanced NDT techniques for the inspection of Ti-6Al-4V Titanium alloy landing gear parts obtained by powder bed fusion (PBF) and wire arc melting (WAM). Innovative ultrasound techniques will be developed and adapted to three families of parts defined by their geometric complexity. The developed techniques will then be validated on reference parts with simulated defects. The validated techniques will then lead to guidelines for inspection procedures for each family of parts.