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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Fracture Properties and Residual Stresses in Small Dimensions
Presentation Title Nanoscale Strain Mapping of Individual Defects during In Situ Deformation
Author(s) Thomas Pekin, Colin Ophus, Christoph Gammer, Jim Ciston, Andrew Minor
On-Site Speaker (Planned) Andrew Minor
Abstract Scope Recent advances in local strain mapping using nanobeam electron diffraction (NBED) has demonstrated the ability to observe single defects and the strain fields around them at a resolution of single nanometers. In addition to measuring the strength of small-volumes, measuring the evolution of strain during plastic deformation is of great importance for correlating the defect structure with material properties. This work will highlight our latest results from in situ strain mapping in an Al-Mg alloy and stainless steel using both contact loading methods (such as in situ nanopillar compression and nanoindentation) as well as non-contact methods such as tensile straining. Our method of local strain mapping consists of recording large multidimensional data sets of nanodiffraction patterns during the test. The resulting dataset contains diffraction data for every point of the STEM image, from which strain maps can be extrapolated on a scale not previously possible during in situ deformation.
Proceedings Inclusion? Undecided


Atomistic Simulations of Crack Nucleation and Propagation along Grain Boundaries
Brittle-to-ductile Transition of Quasicrystals at Small Scales: Cracking, Serrated flows, Diffusion and Phase Transformation
Constitutive Modeling of Indentation Cracking in Fused Silica
Coupling Discrete Dislocation Plasticity and Cohesive Zone Models
Critical Stresses in Intermittent Plasticity
Directional Dependency of the Fracture Behavior of High Strength Pearlitic Steel Wires
Enhanced Fracture Toughness of Mg/Nb Laminated Composites
Enhancing Ductility of Metal-Metal (BCC-HCP) and Metal-Ceramic Multilayered Nanocomposites
Extraordinary Stability of Clamped Beam Fracture Toughness Specimen: Stress Intensity Factor Solutions and New Insights on Possibilities at Small Dimensions
Fracture Toughness of Beryllium Using Insitu X-ray and Digital Image Correlation Techniques
High Temperature Mechanical Properties of Materials Synthesized from Graphene and Carbon Nanotubes
Improved Fracture Resistance of Brittle Molybdenum Thin Films on Polyimide with Stress Tailoring
In Situ Micron Scale Fracture Toughness Testing and Modeling of a Chevron Notched Bowtie-shaped Beam
In Situ Stable Crack Growth at the Micron Scale
In Situ Stable Fracture of Sapphire-Niobium Interfaces
Indentation Fracture Experiments on Single Crystal Olivine from 300K to 1100K
Liquid Metal Embrittlement at the Micro-scale: Gallium FIB vs. Xenon FIB
Measurement of the Fracture Toughness of Thin Films by Pillar Splitting: Effect of Materials Structure and Indenter Geometry
Micro-Compression Testing of Mg-Nb Multilayered Nano-Composites for Ultra-High Strength, Formability and Ductility
Nanoscale Strain Mapping of Individual Defects during In Situ Deformation
Orientation Dependent Fracture Behaviour of LiTaO3 and LiNbO3 Single Crystals
Oxide-induced Substrate Cracking in Ti and Stainless Steels Driven by Pulsed Laser Irradiation
SEM-based In-situ Fracture Measurements of Ceramics and Metals
Small-scale Testing Methodology to Study Fracture Toughness of Interfaces in Multilayered Systems
Studying Plasticity during Fracture at the Micron Scale by Means of Cantilever Experiments in Single-crystalline NiAl and W – HR-EBSD Analyses and Elevated Temperature Measurements
Temperature-Dependent Delamination Failure of Metal-Ceramic Interfaces
Tensile Deformation Behaviour of Notched Nano-scale Metallic Glass Specimens
The Surface Residual Stress of High-frequency Induction Brazing of Cemented Carbide to Alloy Steel

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