End-colloquium Elena Zancato

Additive manufacturing is a set of techniques for the additive production of components known for the great freedom and geometric complexity that its products possess. 
This freedom, however, is considerably reduced by the machining that the part must undergo in order to be considered reliable and be used in structure-related areas, as there is not enough information on how the as-built material (which contains multiple defects) behaves compared to machined material.
This research identifies some key mechanical properties for a component produced with WAAM and studies its fatigue behavior compared to machined components. 
Hence, different type of test have been conducted on both machined and as-built components, and also the effects of certain other contributing factors, such as a different load ratio and pre-existing residual tensions inside the part, have been considered. This allows to experimentally estimate the effect of surface and internal defects on the part lifespan, effect which is then compared with a value determined analytically by FEM analysis.
The last step in the research is to create a diagram (Kitagawa) that connects the stress range applied to the crack length for WAAM 304L components.
It’s still a work in progress, but I hope to see you there and gain important feedback from you!
 

presence is only allowed after a humble gesture by bringing a nice bottle of wine