About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
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Presentation Title |
Investigating Local Microstructural Response During Short Fatigue Crack Growth in SLM IN718 Subjected to High Cycle Fatigue Loading |
Author(s) |
Priya Ravi, Diwakar Naragani, Jun-Sang Park, Peter Kenesei, Michael Sangid |
On-Site Speaker (Planned) |
Priya Ravi |
Abstract Scope |
Additive manufacturing (AM) has gained immense popularity over the past decade due to its advantages over the conventional manufacturing methods. However, the performance of AM parts in fatigue and fracture critical applications is still uncertain. This study explores the short fatigue crack growth (SFCG) mechanisms in AM Inconel 718 using in situ high-energy diffraction techniques. The evolution of the 3D microstructure and grain-averaged stresses in the vicinity of a propagating crack as well as delayed crack opening was captured during loading. The SFCG was observed to follow a mixed mode style of propagation (mode I opening and mode II shear), which were analyzed via the alignment of the crack growth direction with the stress state experienced in the grains ahead of the crack tip, such as maximum principal stress, resolved shear stress (RSS), and normal stress to the plane experiencing the maximum RSS. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |