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 |
Combining Atom-probe Tomography and Synchrotron Methods to Investigate In-situ Precipitation in AM-produced Alloys |
Author(s) |
Eric Jaegle, Philipp Kürnsteiner, Pere Barriobero-Vila, Markus B. Wilms, Frederic De Geuser, Dierk Raabe |
On-Site Speaker (Planned) |
Eric Jaegle |
Abstract Scope |
The re-heating induced by adding material track-by-track and layer-by-layer during AM, often termed intrinsic heat treatment, can be used to trigger precipitation reactions in-situ. Due to the inhomogeneous heat input, the state of precipitates (number density, size, chemistry) often varies within the AM-produced specimens. Changing the material composition during deposition for alloy design purposes additionally introduces chemical inhomogeneity. While high-resolution microscopy techniques such as Atom-Probe Tomography (APT) offer detailed insights into e.g. local precipitate chemistry, obtaining a statistically reliable overview of an inhomogeneous material is a laborious process. We therefore combine APT with synchrotron-based methods such as HEXRD and SAXS to achieve a detailed and reliable insight into in-situ precipitation reactions. This information allows to select optimum alloy compositions and to construct kinetic models for the precipitation transformation. The material systems investigated in this study include Al-Sc-alloys and maraging steels (Fe-Ni-Ti/Al), both produced by DED. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |