|About this Abstract
||2011 TMS Annual Meeting & Exhibition
||Aluminum Alloys: Fabrication, Characterization and Applications
||Microstructure Evolution Of Cryomilled Nanostructured Light Weight Al 5083 During SPS
||Yuhong Xiong, Dongming Liu, Ying Li, Baolong Zheng, Troy Topping, Yizhang Zhou, Deepak Kapoor, Chris Haines, Joseph Paras, Darold Martin, Julie M. Schoenung, Enrique J. Lavernia
|On-Site Speaker (Planned)
Al alloys are widely used because they provide the combination of light weight and high strength. In recent years, spark plasma sintering (SPS) technology has emerged as a viable approach to sinter materials due to its rapid heating and high pressure application features. In this study, SPS was chosen to produce dense ultrafine-grained bulk samples using cryomilled nanostructured powder. A bimodal microstructure and banded structures were observed through TEM investigation. The evolution of such microstructures can be attributed to the starting powder and the process conditions, which are associated with the thermal, electrical and pressure fields present during SPS. A finite element method (FEM) was also applied to investigate distributions in temperature, current and stress between metallic powder particles. The FEM results reveal that the localized heating, deformation and thermal activation occurring at inter-particle regions are associated with the formation of the special microstructure.
||Planned: A print-only volume