| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
Ex-situ Synchrotron X-ray Diffraction Mapping of Al-Al and Al-steel Joints Formed Using the Novel HiVe Process |
| Author(s) |
Rakesh R. Kamath, Jonova Thomas, Sridhar Niverty, Benjamin Schuessler, Andrew Chih-Pin Chuang, Vineet V Joshi, Dileep Singh |
| On-Site Speaker (Planned) |
Rakesh R. Kamath |
| Abstract Scope |
Novel impact-based, high velocity joining processes are being demonstrated on multi-material joints for the automotive industry. Two such multimaterial joints were produced in clinch form using a novel High Velocity (HiVe) technique developed at PNNL. Joints comprising AA6061-AA6061 3mm thick sheet and AA6061-Steel (DP590), showed metallurgical bonding and high lap-shear strengths. To better understand the microstructural features responsible for these favorable properties, synchrotron x-ray diffraction was used to map the residual strain and phase distribution at the joint interface and the base material in transmission geometry at beamline 1-ID-E, APS. Lattice-plane-specific residual stresses as a function of location were calculated in two salient perpendicular directions using diffraction peak positions. Further, peak widths were used to understand the spatial variation of crystallite size and dislocation density. Additionally, changes in the peak intensity were used to gain a preliminary understanding of the localized changes in crystallographic texture that occurred during the process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Joining, |