About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
|
Presentation Title |
Manipulating Fatigue Life in L-PBF with Contour Control |
Author(s) |
Christian Gobert, Austin Ngo, David Scannapieco, John Lewandowski, Jack Beuth |
On-Site Speaker (Planned) |
Christian Gobert |
Abstract Scope |
Poor fatigue life of laser powder bed fusion (L-PBF) components limits complete adoption for aerospace applications. Contour scan vectors in L-PBF print at or near the free surface of parts, a fatigue critical zone, and can therefore influence component fatigue life.In this research the influence of developed contour strategies on TiAl6V4 4-pt bend fatigue specimens is studied. Designed contour strategies were parameterized with respect to remelt width-into-part and depth, defining a contour remelt zone. Cross-section optical microscopy was used to observe porosity content of contour remelt zones. To isolate the impact of contour selection and remelt zone size on fatigue life,various surface finishes and infill strategies were incorporated during testing. |