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 |
In-situ TEM Heating Experiments to Study the Effect of Thermal Gradients on Additively Manufactured Ti-6Al-4V Builds |
Author(s) |
Sriram Vijayan, Meiyue Shao, Chris Blackwell, Sabina Kumar, Sudarsanam S Babu, Joerg R Jinschek |
On-Site Speaker (Planned) |
Sriram Vijayan |
Abstract Scope |
In the electron-beam melting powder-bed fusion (EBM-PBF) additive manufacturing (AM) process, the uppermost build layer undergoes rapid solidification and reduced partitioning. Additionally, the subsequent layers below the upper-most build layer are exposed to fast thermal cycling and large thermal gradients across the build plane and build direction, resulting in a non-equilibrium microstructure. The sequence of solid-state transformations that leads to the formation of this microstructure is still unclear. In this work, we use a membrane-based in situ TEM heating holder to study solid-state transformations in AM Ti-6Al-4V samples. These TEM heating holders allow rapid heating/cooling of samples in a controlled manner, capturing dynamic processes in real-time at high spatial resolution, thereby simulating various thermal phenomena in the EBM-PBF process. Here, we present results from in situ TEM heating experiments performed on Ti-6Al-4V powder particles and AM parts to understand the sequence of transformations observed during the EBM-PBF process. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |