|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Ultrafine Grained Materials IX
||X-6: Excessive Generation of Defects in Nano/Ultrafine Grained Bulk Produced by Shock Wave Consolidation Process and Analysis on the Process through Finite Element Method
||Dong-Hyun Ahn, Hyoung Seop Kim, Lee Ju Park, Wooyeol Kim
|On-Site Speaker (Planned)
Shock consolidation of ultrafine copper powders at room temperature for nano/ultrafine grained bulk is achieved in a gas gun system. Through the shock consolidation process, very high pressure can be applied at extremely short time. Strain imposed on particles could vary up to large value depending on the condition of the process. Due to extreme conditions, very high dislocation densities measured by X-ray line profile analysis were generated in the consolidated bulk. Their excessiveness causes higher mechanical properties than conventional severe plastic deformation process. However, these feature is degraded after deformation at softer condition than shock state due to instability in microstructure. For deeper understanding on the microstructure evolution, not only scanning electron microscope, electron backscatter diffraction technique, X-ray diffraction analysis, etc. (as experimental method) but also finite element method about the consolidation process were also used.
This presentation is applied for Young Scientist Best POSTER Presentation.