About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Evolution of Porosity in Additively Manufactured Steel 316L Dog Bone Specimens Under Tension: X-Ray Computed Tomography Study |
Author(s) |
Fidel Baez, David Moore, Borys Drach |
On-Site Speaker (Planned) |
Fidel Baez |
Abstract Scope |
An ex-situ study of porosity evolution under tension was performed on laser powder bed fusion manufactured stainless steel 316L dog bone specimens with a 2.4x2.4 mm cross-section and 10.4 mm long test section using X-ray computed tomography (CT).
Five specimens were scanned before loading was applied and after each of the three tensile loading steps: (1) 20% strain, (2) maximum stress, and (3) failure. CT data were analyzed to compute the volume and maximum linear dimensions of individual pores, as well as to obtain spatial distributions of these quantities within the specimens. Additionally, the fracture surfaces were analyzed using a scanning electron microscope (SEM).
Initiation locations of cracks that led to ultimate failure were identified in the initial scans. The results showed that cracks leading to failure grew as a result of the coalescence of small pores in closely spaced clusters. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |