|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||Thermal Stability and Grain-boundary Segregation in Al-Alloy Thin Films
||Aashish Rohatgi, Arun Devaraj, Rama Sesha Vemuri, Libor Kovarik, Xiujuan Jiang, Giridhar Nandipati, Suveen Mathaudhu, Wenbo Wang, Jason Trelewicz
|On-Site Speaker (Planned)
The goal of our work is to identify structural alloy compositions that possess a thermally stable nanostructure that can, thus, take advantage of their nanostructure-driven superior mechanical properties at elevated temperatures as well. Recent literature has shown the possibility of using solute segregation at the grain boundaries as a means to achieve thermally stability of nano-grained materials against grain growth. Solute segregation is postulated to lower the grain boundary energy and hence, reduce the thermodynamic driving force for grain growth at elevated temperatures. In this work, we explore the feasibility of thermal stability in nanostructured Al-based alloys. Al-alloy thin films with different solute contents were fabricated by the sputtering technique. The sputtered thin films were subjected to elevated temperature annealing treatments for different durations and characterized by atom probe tomography, TEM and indentation. This presentation will describe the potential for solute segregation in Al alloys and its influence on grain-growth.
||Planned: Supplemental Proceedings volume