| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Correlative Atomic-scale Analysis of Nano-scale Precipitate Evolution in Additively Manufactured Maraging Steel |
| Author(s) |
Pradeep Konda Gokuldoss |
| On-Site Speaker (Planned) |
Pradeep Konda Gokuldoss |
| Abstract Scope |
Maraging steels are a special case of almost carbon-free type of steels where the strength depends on the formation, distribution of various types of precipitates in a Martensitic matrix. Selective Laser Melting (SLM) involves combination of rapid quenching and selective re-heating of layers resulting in metastable phase formation. This work therefore attempts to analyze correlatively the crystal structure of the nano-scale precipitates formed along with their precise local chemical composition in a high statistical manner.
To achieve the above, novel correlative SEM based microscopic techniques such as TKD and STEM is utilized while the precise local chemical composition at near atomic-resolution is obtained from the investigated volume using APT. This correlative methodology applied to as-SLM and post-processed states namely, only ageing; solution treatment and ageing, provides deeper insights into the role of starting dendritic, cellular microstructures in the precipitation kinetics and hence to the final mechanical properties of the alloy. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |