| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Effect of Cyclic Rapid Thermal Loadings on the Microstructural Evolution of a Cantor Alloy During Selective Laser Melting Processes |
| Author(s) |
Hao Wang, Zhiguang Zhu, Hansheng Chen, Sharon Mui Ling Nai, Rongkun Zheng, Sophie Primig, Sudarsanam S. Babu, Simon Peter Ringer, Xiaozhou Liao |
| On-Site Speaker (Planned) |
Hao Wang |
| Abstract Scope |
The additive manufacturing processes of metallic materials consist of cyclic rapid thermal loadings that affect significantly the microstructure and consequently the mechanical properties of materials. Here we used a FeCoCrMnNi high-entropy alloy as the model material to explore the effects of cyclic thermal loadings on local microstructure and mechanical properties. Transmission electron microscopy and atom probe tomography were used for structural characterisation. Results showed that, with the increase of the number of cyclic thermal loadings, the microstructure evolved from a nanocrystalline structure in the top layer, through coarse grains with cellular dislocation structures in a middle layer, to nanotwin and hierarchical nanotwin structures in the bottom layer. Significant Mn and Ni segregations at dislocation cell wall areas were observed. Mn and O rich precipitates were observed along the dislocation walls. The impact of local microstructure and elemental distribution on the mechanical properties of the material will be discussed in detail. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |