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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Bulk Processing of Nanostructured Powders and Nanopowders by Consolidation
Presentation Title Dynamic Cu Grain Growth of Mechanically Milled Nanostructured Cu-5vol.%Al2O3 Powder Particles during Hot Extrusion
Author(s) Dengshan Zhou, Deliang Zhang, Paul Munroe, Charlie Kong, Wei Zeng
On-Site Speaker (Planned) Dengshan Zhou
Abstract Scope We report the microstructural evolution of mechanically milled nanostructured Cu-5vol.%Al2O3 powder particles during 6 minute static annealing and extrusion at temperatures ranging from 300 to 600oC. After annealing at 300 or 400oC, the average sizes ofCu grains and Al2O3nanoparticles of the as-milled powder particles remained nearly unchanged, while annealing at500or 600oC caused partial recrystallization and limited grain growth of the Cu matrix and clear coarsening of Al2O3nanoparticles. The dislocation density of the extruded samples was much lower that of the annealed powders and changed slightly with increasing extrusion temperature.TheAl2O3nanoparticles in the extruded samples showed less coarsening in comparison with those in the annealed powders, dynamic recrystallization and rapid grain growthof the Cu matrix occurred during extrusion even for a relatively low extrusion temperature of300oC. The dynamic recrystallization and rapid grain growth of the Cu matrix during extrusion is strain induced and maybe associated with grainboundary migration and grainrotation.
Proceedings Inclusion? Planned: A print-only volume


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Bulk Processing of Nanostructured Advanced Materials
Bulk Processing of Nanostructured Powders for Functional Materials with Hierarchical Structure Inspired by Natural Species
Controllable Preparation of Nickel Nanoparticles by Arc Discharge Method
Dynamic Cu Grain Growth of Mechanically Milled Nanostructured Cu-5vol.%Al2O3 Powder Particles during Hot Extrusion
Fabrication of Titanium with a Novel Duplex Microstructure and High Strength
Fracturing Mechanism of Carbon Nanotubes Reinforced Aluminum Matrix Composites
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Modified Strain Rate Regime in Consolidated Ultrafine Copper Powders with Silver Micro-alloying
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Progress Towards Development of Nanostructured Magnesium Alloys and Composites: Understanding of Magnesium Strengthening by Solid Solutioning and Grain Size Reduction
Shock Wave Consolidation of Hierarchical Copper Powders Consisting of Nano/Ultrafine Particles and Micro Agglomerates, and the Mechanical Properties of Synthesized Bulk
Spark Plasma Heat Treated Coarse- and Nano-powder ZrB2-SiC and HfB2-SiC Composites
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Spark Plasma Sintering (SPS) vs. Hot Isostatic Pressing (HIP) of Nanostructured Aluminum Alloy Powders
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Surface Energetics Studies of Nanomaterials
Synthesis and Consolidation of Nanocrystalline Fe-10Cr-3Al Alloy Powder
Synthesis and Morphology Characterization of Nanocrystalline ZnO Powder Fabricated by a Green Low Temperature Route
Synthesis of Porous Boron Nitride Nanosheets with High Pore Volume
Synthesis of Quasi-Nano-sized Ni-Zn-X-Ferrites (Gd, Cu, Mg) by Using Combustion Synthesis and Improvement of Purity by Wet Process
The Effect of Er on Grain Growth in Cryomilled Al-Mg-Er Powders
The Influence of Heat Treatment Temperatue on the Bulk Cu-Al/B4C Prepared by Spark Plasma Sintering
The Key Issues in Fabrication of Ultrafine Structured Metallic Materials and Metal Matrix Nanocomposites by Thermomechanical Consolidation of Nanostructured Powders
TiO2-CeO2Nano Crystalline Powders and Thin Films by an Aqueous Sol-Gel Process: Effect of Ce:Ti Molar Ratio on Microstructure and Physical Properties
Tri-modal Composites: A Review
Two-Stage Sintering of Nano-sized Yttria Stabilized Zirconia with Polymer Sphere Generated Porosity

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