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

在航空航天工业中，添加剂制造(AM)越来越多地被用于生产关键部件，因为它允许在重量、成本和工程性能方面获得相当大的收益。然而，由于对工艺重复性的信心有限，这与缺乏有效的无损检测(NDT)来评估制造部件的质量密切相关，从而减缓了其扩张速度。需要开发和优化无损检测技术，以解决AM零件具有挑战性的特性，如表面粗糙度、孔隙率、各向异性和该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，开发先进的无损检测技术，以检验通过粉末床熔化(PBF)和线弧熔炼(WAM)获得的Ti-6Al-4V钛合金起落架零件。创新的超声波技术将被开发和调整，以适应由几何复杂性定义的三个部件家族。然后，开发的技术将在具有模拟缺陷的参考部件上进行验证。然后，经过验证的技术将导致每个部件系列的检查程序指南。

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.