| About this Abstract |
| Meeting |
2016 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Processing of Nanostructured Powders and Nanopowders by Consolidation
|
| Presentation Title |
Shock Wave Consolidation of Hierarchical Copper Powders Consisting of Nano/Ultrafine Particles and Micro Agglomerates, and the Mechanical Properties of Synthesized Bulk |
| Author(s) |
Dong-Hyun Ahn, Wooyeol Kim, Lee Ju Park, Hyoung Seop Kim |
| On-Site Speaker (Planned) |
Dong-Hyun Ahn |
| Abstract Scope |
In order to synthesize nano/ultrafine grained bulk materials, shock wave consolidation by high pressure and short process time was applied to hierarchical copper powders. The used powders having nano/ultrafine particles and micro agglomerates were produced through hydrogen reduction to eliminate oxide layers impeding powder consolidation and relatively stabilize surface. The mechanical properties and microstructure of the consolidated bulk were characterized by micro hardness and compressive tests, and X-ray diffraction, scanning electron microscope and electron backscatter diffraction technique, respectively. Nearly full solid densities (~98% of relative density) were achieved. Due to not only very refined microstructure but also excessive defect densities generated by shock deformation, higher strength than acquired by severe plastic deformation was obtained. For relating shock wave consolidation process and the properties of the bulk, finite element method was also used. |
| Proceedings Inclusion? |
Planned: A print-only volume |