About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Metal Matrix Composites: Processing, Additive Manufacturing, and Applications
|
| Presentation Title |
Microstructural Evolution of Additively Manufactured 316L+TiC Metal Matrix Composites During Heat Treatment Revealed by in-situ Neutron Diffraction |
| Author(s) |
Geli Fan, Maoxuan Feng, Kazi Nosheen Ava, Dunji Yu, Ke An, Yan Chen, Minglei Qu |
| On-Site Speaker (Planned) |
Minglei Qu |
| Abstract Scope |
Additively manufactured (AM) metal matrix composites (MMCs) exhibit enhanced mechanical properties but often retain highly non-equilibrium microstructures. Understanding how their microstructure evolves during heating is critical for assessing high-temperature stability and designing heat treatments to further improve performance. Here, we employ in-situ neutron diffraction to investigate the microstructural evolution of AM 316L+5%TiC MMCs during continuous heating to 1100 °C and during isothermal annealing at 700 °C. Combined with particle–matrix stress interaction modeling and TEM, we quantitatively elucidate the temperature-dependent evolution and underlying mechanisms of key microstructural changes, including thermal misfit stress relaxation, chemical redistribution, phase precipitation, and dislocation evolution. This study provides quantitative insights into the microstructural evolution of AM MMCs during heating, offering critical guidance for designing heat treatments to optimize performance for diverse applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Composites, Characterization |