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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Ultrafine-grained Materials X
Presentation Title Bulk Nanocrystalline Metals Cast under Slow Cooling
Author(s) Chezheng Cao, Gongcheng Yao, Abdolreza Javadi, Xiaochun Li
On-Site Speaker (Planned) Chezheng Cao
Abstract Scope When the grain size of a polycrystalline metal is below 100 nm (i.e. nanocrystalline metals), interface physics becomes significant due to the drastically increased grain boundaries, resulting in unusual properties. However, it has been a long-standing challenge to cast bulk nanocrystalline metals under slow cooling. Here we report a new discovery that nanoscale grains can be achieved under slow cooling rates (below 70 K/s) when the molten metal contains populous self-dispersed nanoparticles. It is believed that the populous nanoparticles effectively nucleate grains while restricting grain growth during solidification. The as-cast bulk nanocrystalline metal shows exceptional strengths and high temperature stability. This method paves a new way to cast bulk nanocrystalline metals for mass production.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


A New Mathematical Framework for Simulation of Grain Growth
Accumulative Roll Bonding (ARB) for Making Bulky Metals with Ultrafine Grained Structures
Achieving Ultra-high Strengthening of A2024 Alloy through Combination of High-pressure Torsion and Subsequent Aging Treatment
Activation Volume Tensors for Atomistic Events at Grain Boundaries
Anomalous Deformation Behavior of Thermally Stable Nanocrystalline Immiscible Alloys
Are Selected Laser-melted (SLM) Alloys UFG?
Atomistic Simulation of Driven Steady States in Rolled Cu-Nb Nano-composites
Averting Plastic Flow Localization in Metal Nanocomposites by Tailoring Microstructure Morphology
Bulk Nanocrystalline Metals Cast under Slow Cooling
Comparing Grain Growth Mechanisms in Nanocrystalline FCC Metals due to Ion Irradiation, Mechanical Loading, Conductive Heating, and Laser Heating
Compositionally Tailoring the Mechanical Properties of Nanotwinned Metal Thin Films for Preliminary Micro-cantilever MEMS Devices
Corrosion Behavior of Ultrafine Grained Aluminum and Magnesium Alloys
Crystal Plasticity Modeling of Tensile and Cyclic Behavior of Ultrafine Grained Films: Effects of Crystallographic Texture
Crystal Plasticity of Microstructural Evolution via Twin Boundary Migration in Nanotwinned Metals
Development and Characterization of Nanostructured Steels for Nuclear Applications
Development of Al and Mg-based Nanostructured Alloys
Development of SPD Techniques for the Fabrication of Long-length Rods from UFG Materials
Development of Ultrafine Grain Structure with Weak Texture in New Mg-4Li-1Ca Alloy by Equal Channel Angular Pressing (ECAP)
Effect of Cu on Structure and Mechanical Properties in an Al-0.3%Cu Alloy Cold Rolled to 98%
Effect of SPD Processing Combined with Ultrasound on Structure Transformation in a Low-alloyed Chromium Bronze
Effect of Subgrain Structure on Superplasticity of Ultrafine-grained Ti-6Al-4V
Effect of Texture on Inhomogeneous Shear in ECAP
Evolution of Structural Instabilities during Cyclic Deformation of UFG Metals
Exceptional Properties by Expanding Microstructural Landscape via Friction Stir Processing
Extending the Limits of Nanostructured Metals Created by Dislocation Plasticity
Fabrication of Ultrafine Grained Plates with Low Anisotropy of Mechanical Properties
Fracture Behavior of Bulk Cu with Nanoscale Twins
Gaining New Insights into Structure/Property Relations by Mining and Analysis of Published Images
Grain Boundary Statistical Mechanics: A Disconnection Dynamics Approach
Grain Coarsening in Two-dimensional Phase-field Models with an Orientation Field
Heterogeneous Structures: The Next Hot Research Area?!
High-pressure Torsion as a Novel Technique for Processing High Strength Zn-based Alloys
High-pressure Torsion of Copper-molybdenum Composites
High Shear Deformation to Enhance Properties of a Bioabsorbable Magnesium Alloy
Historical Aspects and Future Prospects of NanoSPD Materials Research for Superior Properties
Improving Mechanical and Functional Properties of Conductive Nanostructured Aluminum Alloys
Increased Defect Densities in SPD-processed Hydrogenated Palladium and their Impact to the Macroscopic Strength
Incremental Feeding for Upsizing Severely Deformed Areas under High Pressure
Investigation of Fatigue Micro-mechanisms in Ultrafine Grained CoCrxNi Medium Entropy Alloy
Issues of Intermetallic and Precipitates Segregation inside Adiabatic Shear Bands of SPD-processed Al 6061
M-29: Effect of Microalloying Additions on the Continuous Recrystallization during Severe High Strain-rate Plastic Deformation
M-30: Manufacturing Method and Material Characterization of Nanocrystalline Nickel Coatings with Gradient Grain Size
M-31: Possibility of Manifestation of Dynamic Strain Aging under Severe Plastic Deformation of Low-carbon Steels
M-32: Study of Densification and Microstructure of Cu-C Composite Prepared by Mechanical Alloying
M-33: Aging-induced Microstructure and Texture Evolution of AA 6201 after High Shear Deformation
Manufacturing Fine-Grained Mg Rods Utilizing Multi-Pass Caliber-Rolling at Warm Temperatures
Mechanical Behavior of 304L Austenitic Stainless Steel Processed by Cryogenic Rolling
Mechanical Behavior of Bulk Mg-based Ultra-fine Layered Composites
Mechanical Behavior of UFG Titanium at Elevated Temperatures
Mechanical Properties and Microstructures of a TiZr Alloy for Dental Implants
Mechanical Properties of Mg-3%Gd with a Heterogeneous Lamella Structure
Mechanical Properties of Ultrafine Grained 2519 Aluminum Alloy
Mechano-chemical Synthesis of Nb-oxide Cu Nanocomposites
Micro-mechanical Response of Gamma-based TiAl Intermetallic Compound Processed by High-pressure Torsion
Microstructural Evolution and Mechanical Behavior of a TiC/FeCoNi Composite Fabricated through In Situ Reinforcement Formation
Microstructural Evolution and Thermal Stability of Accumulatively Roll-bonded Cu-Nb Nanolaminates
Microstructure of Refined Ti15Mo Alloy for Biomedical Use
Microstructure, Hardness, and Recrystallization of Tungsten Processed by ECAE to High Strain at Very Low Homologues Temperature
Nanocrystalline Cu Deformation Characterization Simulations
On Interfaces and Radiation Damage
Oxygen and Zirconium Clustering in Nanocrystalline Fe-Zr Alloys and its Impact on Microstructural Stability and High Temperature Mechanical Properties
Phase Transformations and Aging Behavior of Pure Ti and Ti-6Al-7Nb Processed by High-pressure Torsion
Production of Bulk Nanograined Si by High-pressure Torsion at Various Pressures
Recent Developments in the Processing of Ultrafine-grained Materials Using ECAP and HPT
Role of Alloy Properties in Forced Chemical Mixing of Cu-X-Mo Ternary Alloys (X=Ni, Ag)
Severe Deformation at Elevated Temperatures - the Key to Extremely Elongated Nanostructures
Shear Assisted Processing and Extrusion (ShAPE): Bulk Property Enhancement through Tailored Microstructure
Strategies to Improve the Fatigue Crack Growth Behavior of SPD-processed Metals
Strengthening and Toughening Effects of Twin Mesh Structures in Polycrystalline Mg
Structural Stability of Ultra-fine Grained Metastable Beta Titanium Alloys
Struggles in the Land of Opportunity: 25 Years of ECAE Adventures with Tools, Teams, Tough Times, and Triumphs
Study on the Interface of ECAP Cold-welded Cu-Al and Ni-Cu Rods
Surface Structure Transitions during Sliding Contact of Nanostructured Metals
TEM In-situ Mechanical Testing of Proton Irradiated Nanocrystalline Copper Tantalum Alloy
Tensile Characteristics of Ultrafine Grained Fe-Cr-Mn Stainless Steel Fabricated by Reverse Transformation
The Early Days of Pioneering Ultrafine Grained Metals and Alloys
The Effect of Bismuth on Microstructure Evolution in Ultrafine-grained Copper
The Impact of Severe Plastic Deformation and Subsequent Annealing on Elevated Temperature Deformation Behavior of Al-Mg Alloys
The Influence of Microstructure Characteristics on Plastic Deformation Mechanisms in Severely Deformed Aluminium
The Mechanical Properties of Cu-Ni Multilayer Composite Materials
The Path to Generating Bulk Nanocrystalline Parts for Mechanical Testing
Thermally Induced Grain Coarsening in Alpha Iron
Thermodynamical Instability of a Single-phase, Nanocrystalline TiZrNbHfTa Alloy and its Impact on the Mechanical Properties
Ultra-fine Grained Al Alloys and Composites Processed via Powder Metallurgy Route
Ultra-fine Laminated Mg/Nb Composites Produced via Accumulative Roll Bonding
Zirconia Ceramic Toughened Nanocrystalline Iron

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