| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics and Kinetics of Alloys II
|
| Presentation Title |
Grain Size Effects on Interdiffusion in Multicomponent Alloys |
| Author(s) |
Bhawna Yadav, Nuli Krishna Chaitanya, Aditya Burla, Sadhasivam , Guruvidyathri K, Joydip Joardar, KG Pradeep, Mayur Vaidya |
| On-Site Speaker (Planned) |
Bhawna Yadav |
| Abstract Scope |
The present study focuses on investigating the phase growth during interdiffusion by employing a novel sandwich couple approach comprising of CG-M/Sn/UFG-M materials (where CG: coarse-grained, UFG: ultrafine-grained, and M: Ni, CoNi, and CoFeNi) in the temperature range 175- 215℃. It has been demonstrated that the phase transformation in IDZ is controlled by both thermodynamics and kinetic factors. For e.g., in CoNi diffusion couples, at 175℃, only CoNiSn3 intermetallic phase is observed at CG interface, while UFG interface displayed the formation of the CoNiSn2 phase. At 200℃, formation of the CoNiSn2 phase together with the CoNiSn3 phase is observed at the CG interface, whereas only the CoNiSn2 at the UFG interface. The preferred formation of CoNiSn3 at CG interface is due to faster diffusion of Sn, whereas thermodynamically more stable CoNiSn2 phase appears at UFG side. Time-temperature dependent measurements for UFG revealed accelerated phase growth compared to CG across all systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Other, |