About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
|
Symposium
|
6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
Understanding the Influence of Porosity and Defects on
Mechanical Behavior in Additive Manufactured 316L Stainless Steel Using
In-situ X-ray Computed Tomography |
Author(s) |
Aeriel D. Murphy-Leonard, Dave Rowenhorst, Richard Fonda |
On-Site Speaker (Planned) |
Dave Rowenhorst |
Abstract Scope |
Three-dimensional techniques such as x-ray micro-computed
tomography (XCT) enable the ability to fully visualize and quantify porosity and provide
fundamental relationships between pore size and morphology on mechanical
behavior and damage evolution. In the current study, the influence of pore
and void size, morphology, and distribution on crack initiation, growth, and
coalescence during tensile and cyclic loading was examined using a lab based XCT system and in-situ synchrotron XCT. The material examined was additively manufactured (AM) 316L stainless steel. The specimens were produced using laser powder bed fusion techniques where the gauge diameter was 1 mm. Static XCT revealed that in conditions where the cross-sectional area is small majority of the porosity was in-homogeneously distributed where a higher distribution of porosity was found near the surface which is commonly seen
in additively manufactured materials. It was also determined that cracks initiated at near surface defects in the specimen during fatigue. |
Proceedings Inclusion? |
Definite: Other |