About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
|
Presentation Title |
Detection of Early Crack Formation of Fatigued, Additively Manufactured Stainless Steel Using Neutron Dark-field Imaging |
Author(s) |
Adam J Brooks, Daniel Hussey, Hong Yao, Ali Haghshenas, Jumao Yuan, Jacob M LaManna, David L Jacobson, Caroline Lowery, Shengmin Guo, Michael Khonsari, Leslie G Butler |
On-Site Speaker (Planned) |
Daniel Hussey |
Abstract Scope |
Abstract: Fatigue in selective laser melted (SLM) and conventionally manufactured stainless steel (SS) 316 dogbones was studied with neutron dark field imaging [1]. To produce the dark field images, a far field interferometer was employed. The dark-field image combines sensitivity to micrometer-sized scattering centers (diameters ranging from ~600 nm to 2000 nm) at crack formation with sub-millimeter image spatial resolution. The crack formation observed with the neutron dark-field was validated post-imaging with additional fatigue cycles to fracture. Further inspection was performed by scanning electron microscopy (SEM) and optical photography. In the two fatigued dogbones, SLM and conventional crack formation was identified to within 1 mm.
[1] A.J. Brooks et al, Materials and Design 140 (2018) 420–430. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |