About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Lightweight Alloy Matrix Composites
|
| Presentation Title |
Understanding Multi-Stage Deformation Mechanisms in Additively Manufactured Al6061+TiC Nanocomposite by In-Situ Neutron Diffraction |
| Author(s) |
Yan Chen, Minglei Qu, Dunji Yu, Ke An, Jiandong Yuan, Lianyi Chen |
| On-Site Speaker (Planned) |
Yan Chen |
| Abstract Scope |
Percents of TiC nanoparticles are composited in Al6061 via fusion-based additive manufacturing to reinforce the matrix. The rapid heating and cooling during the manufacturing affects the interfacial bonding, thermal misfit stress and load transfer behavior between the metal grains and ceramic particles, thus impacting the bulk mechanical performance. Thanks to the high sensitivity to carbides, continuous in-situ neutron diffraction reveals the evolutions of phase-specific lattice strains, texture and dislocation during uniaxial compression to understand the deformation mechanism. Triaxial phase stresses are resolved showing three-stage behaviors that result from the interaction between Al and TiC near the phase boundary. The TiC particles refine the Al grains, share the load as a stronger phase, and delay and hinder dislocations movement in Al to strengthen the matrix. At 250°C, TiC alters the dislocation activity by influencing dislocation slip and accumulation. The work will serve for material and processing optimizations and modeling validation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Composites |