ProgramMaster Logo
Conference Tools for 2018 TMS Annual Meeting & Exhibition
Login
Register as a New User
Help
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Thermal and Mechanical Stability of Nanocrystalline Materials
Presentation Title The Influence of Grain Boundary Segregation on the Mechanical Behavior of Nanocrystalline Metals
Author(s) Yang Zhang, Wenbo Wang, Jason Trelewicz
On-Site Speaker (Planned) Jason Trelewicz
Abstract Scope Augmenting chemical and structural state of grain boundaries to stabilize nanocrystalline alloys can have marked impacts on the mechanical behavior. Using molecular dynamics simulations, we explore two such effects- stabilization against stress-assisted grain growth and grain boundary segregation strengthening. Surface nanoindentation on nanocrystalline Ni and Ni-P is first employed to quantify the role of competing mechanisms during stress-assisted grain growth. We attribute microstructural evolution to grain boundary-mediated deformation involving boundary migration and grain rotation. The addition of phosphorous stabilizes the boundaries against local atomic reconfigurations that facilitate these mechanisms, in turn eliminating grain growth. Second, the role of segregated solute on strength is explored in nanocrystalline Al-Mg alloys. We find that grain boundary plasticity is again suppressed by solute enrichment producing more stable interfacial configurations. The onset of grain boundary-mediated dislocation plasticity is thus delayed to larger strains, which manifests as an increase in strength far exceeding classical Hall-Petch scaling.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Microstructural Approach toward Improving the Nano Grain Size Stability of Fe14Cr4Hf Alloy
An Atom Probe Tomography Prospective to Nanogranular Thermal Stability
Atom Probe Tomography Investigation of Diamantane Induced Stability in Nanocrystalline Aluminum
Commonalities in the Structure and Plastic Deformation in Disordered Materials and Interfaces
Connecting Thermal Stability to Fatigue and Wear Resistance in Nanocrystalline Binary Alloys
Design Tough Nanoceramics by Reducing Grain Boundary Energy
E-44: Control of Thermal Expansivity in Electroformed Fe-Ni Alloys for the Fine Metal Mask
E-45: Thermomigration of Cu-Sn and Ni-Sn Intermetallic Compounds during Reliability Test in SnAg Solder Joints
Effect of Nanoscale Oxide Dispersion on Thermal Stability of Severely Deformed Fe-Y Alloy
Effect of Temperature on the Deformation Response of Grain Boundary Networks
Effects of Nanotwinning and Nanocrystallinity on the Precipitation Behavior of a Ni-Mo-Cr Superalloy
Exploring the Thermal Evolution of Nanomaterials: From Nanometallic Multilayers to Nanostructures
Grain Boundary Phase Transformations and their Impact on Thermodynamics and Kinetics
Grain Boundary Phases and their Thermal Stability
Grain Boundary Stability Governs Hardening and Softening in Extremely-fine Nano-grained Metals
Grain Boundary (GB) Complexions: From Developing GB 'Phase' Diagrams to Understanding Embrittlement and Stabilizing Nanoalloys
Impact of Segregation on Grain Boundary Motion
In-situ TEM Study of the Effects of W Solutes on Irradiation Induced Detwinning in Cu
Initiation and Stagnation of Room-temperature Strain-induced Grain Coarsening in Thin Au Films
Insights from Variable Temperature and Ultra-high Strain Rate Nanomechanical Testing of Model Nanocrystalline and Nanocomposite Materials Realized by Either Inert Gas Condensation or Alternating Atomic Layer Deposition, Sputtering and Inert Gas Condensation of Nanoparticles
Insights into Deformation Induced Grain Boundary Migration in Ultrafine-grained Metals from a Strain Path Change – Does Texture Play a Role?
Interfaces in HCP/BCC Structural Nanocomposites
Investigating the Thermal Stability of FCC and BCC Nanocrystalline Thin Films by In Situ TEM Annealing and Post Mortem TKD Analysis
Irradiation Creep in Nanostructures Measured Using In-situ TEM
Mechanical and Thermal Stability of Nanocrystalline High-entropy Alloys
Mesoscale Modeling of Grain Boundary Segregation: The Role of Anisotropy in Segregation
Microstructure Characterization and Mechanical Properties of Nanostructured Low Activation Steel Produced by Surface Mechanical Attrition Treatment
Modulating Stability and Strength in Nanocrystalline FCC Metals: The Effects of Microstructure, Composition and Interfacial Character
Polycrystal Plasticity with Grain Noundary Evolution
Probing the Interfacial-driven Radiation Tolerance of Nanocrystalline Metals
Sensitization in Grain Size Gradients – Investigating the Effects of Low Temperature, Long Term Annealing on the Corrosion and Mechanical Response of Nanocrystalline Aluminum Alloys
Stabilization of Nanocrystalline Alloys through the Incorporation of Grain Boundary Complexions
Sub-ablation Femtosecond Laser Processing of Nanocrystalline Alloys
Synthesis, Characterization and Thermal Stability of Nanocrystalline Mg-Zn Thin Films
The Effect of Free Volume and Interfacial Junctions on the Stability of Nanocrystalline Structures
The Influence of Grain Boundary Segregation on the Mechanical Behavior of Nanocrystalline Metals
The Mechanism of Anisotropic Single-crystal Growth in Nanotwinned Copper
The Mechanisms of Thermal Stability and Strength of Nanocrystalline Immiscible Alloys
The Role of Entropy on the Stability of Nanocrystalline Alloys
Thermal Cycling Test of Integrated Fan-out Wafer Level Package with Highly (111)-oriented Nano-twinned Copper
Thermal Stability of Nanocomposite Metals: In Situ Observation of Anomalous Residual Stresses Relaxation during Annealing Under Synchrotron Radiation
Thermal Stability of Thin Ni-Fe Films on Sapphire
Toward Understanding the Factors that Govern the Temperature Dependence of Mobility in FCC Metals

Questions about ProgramMaster? Contact programming@programmaster.org