| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Neutron and X-ray Scattering in Materials Science and Engineering
|
| Presentation Title |
Effects of Cooling Rates on Residual Stress Evolution Quantified via Neutron Diffraction in Lubricant-free, Solid-state Repaired AA7075 |
| Author(s) |
Ning Zhu, Ryan Kinser, Jacob Strain, Luke Brewer, Paul Allison, Brian Jordon |
| On-Site Speaker (Planned) |
Ning Zhu |
| Abstract Scope |
Round feedstock additive friction stir deposition (RF-AFSD) was developed to additively manufacture or repair structural components without the need to pre-spray any lubricant on the feedstock materials, thereby preventing chemical contamination. In this work, RF-AFSD was used to repair AA7075-T6 plates with a milled groove, employing three different cooling rates controls: ambient cooling in open atmosphere, passive cooling by submerging in water, and actively cooling using a backing chiller plate. The evolution of residual stresses in those repairs, with different cooling rates, was quantified via neutron diffraction at the HIDRA beamline at ORNL. Process-structure-property correlations were established from the quantified results, which included temperature and torques data during the RF-AFSD process, grain size measurements from the microstructure, and the distribution of residual stress and microhardness in the repairs produced at different cooling rates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |