About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Investigating Effect of Interfacial Solute Partitioning on Strength of Nanocrystalline Alloys |
Author(s) |
Ankit Gupta, Ilias Bikmukhametov, Thomas R Koenig, Gregory B Thompson, Garritt J. Tucker |
On-Site Speaker (Planned) |
Ankit Gupta |
Abstract Scope |
Solute segregation at grain boundaries (GBs) in nanocrystalline (NC) alloys has been demonstrated to impede grain growth at elevated temperatures and improve the thermo-mechanical stability. However, solute partitioning can also be detrimental to the strength of NC alloys at specific grain sizes and concentrations. Therefore, it becomes important to investigate the effect of interfacial solute partitioning on strength of nanocrystalline alloys along with underlying mechanisms that govern the deformation. Here, we probe the impact of phosphorus segregation in Ni-P alloys on their strength by using nano-indentation and atomistic simulations. The effects of phosphorus partitioning on intragranular and GB deformation mechanisms were evaluated from the amount of strain accommodation by leveraging continuum based kinematic metrics. For various solute levels, the deformation was determined to be GB-mediated control even at large grain sizes. This interplay between grain size, solute concentration, deformation mechanisms and overall strength in nanocrystalline alloy is discussed in detail. |
Proceedings Inclusion? |
Planned: |