| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
High Cycle Fatigue Behaviour of Additively Manufactured 316L Austenitic Stainless Steel |
| Author(s) |
Punit Kumar, Jayaraj Radhakrishnan, James McKinnell, Upadrasta Ramamurty |
| On-Site Speaker (Planned) |
Punit Kumar |
| Abstract Scope |
The microstructures, and mechanical properties of the 316L SS fabricated using binder jet printing (BJP) and laser powder bed fusion (LPBF) were investigated and compared with those of the conventionally manufactured (CM) alloy, with particular emphasis on the high cycle fatigue resistance. Results show that the work hardening behavior, ductility, and fatigue strength (σf) of the BJP specimens, which contain significant amounts of pores, are surprisingly comparable to those of the CM alloy. In contrast, the SLM specimens are considerably stronger, less ductile, and far inferior in terms of σf although the porosity in them is relatively smaller as compared to the BJP specimens. Because of the deformation behaviour and combination of other microstructural factors the small cracks that nucleate at the corners of the pores were arrested, both under quasi-static and cyclic loads; therefore, neither ductility nor σf of the BJP alloys were adversely affected by the porosity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Iron and Steel |