About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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Presentation Title |
Quantifying the Influence of Geometry and Annealing on the Distribution of Micro- and Nano-scale Precipitates and Resulting Mechanical Properties of SLM 17-4PH Stainless Steel |
Author(s) |
Connor Varney , Paul Rottmann, Devin Burns |
On-Site Speaker (Planned) |
Connor Varney |
Abstract Scope |
The mechanical properties of components are largely dictated by their microstructure, and this is especially apparent in precipitation strengthened alloys like 17-4PH stainless steel. Conventionally the thermal history of these alloys had to be tightly controlled since this dictates the distribution of strengthening precipitates, but in additive manufacturing the thermal history can vary significantly across a part or individual layer causing the precipitate distribution and resulting mechanical properties to be non-uniform. In this study both thin-wall (0.8mm) and ASTM E8 size dogbones were printed via SLM and tensile tested in the as-built, solution annealed, and H900 condition to obtain a better understanding the processing-structure-properties relationship for both as-built and traditionally aged AM 17-4PH. The microstructure of the samples was characterized by EBSD. BSE imaging was used to characterize the larger precipitate phases, with SAXS and STEM tomography to quantify the size, shape, and distribution of nanoscale precipitates. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |