Fatigue resistance of laser powder bed fused Ti-6Al-4V alloys with purposely-induced porosity: process-structure-property relationship
Moquin, E. (2023). Fatigue resistance of laser powder bed fused Ti-6Al-4V alloys with purposely-induced porosity: process-structure-property relationship. Thesis.
Application of additive manufacturing processes and more precisely of Laser Powder Bed Fusion (LPBF) is growing since a few decades. This growth is due to the many benefits offered by this process compared to the conventional manufacturing methods. However, LPBF, by its nature, causes the appearance of specific processing-induced flaws that affect the mechanical properties of parts produced, thus limiting their industrial use Among these defects, porosity is particular since it cannot be completely eliminated and its detection is difficult and costly. Knowing that a residual level of porosity is unavoidable and that it affects the mechanical properties of the parts, it becomes crucial to be able to detect and characterize pores in order to determine if their presence is critical in a particular application.