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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Atom Probe Tomography for Advanced Characterization of Metals, Minerals and Materials III
Presentation Title Morphological Classification of Dense Objects in Atom Probe Tomography Data
Author(s) Iman Ghamarian, Emmanuelle A. Marquis
On-Site Speaker (Planned) Iman Ghamarian
Abstract Scope Atom probe tomography (APT) is used for quantifying solute clusters and their interactions with defects in many alloy systems. Reliable quantification is essential to link these microstructural features and their evolution to materials properties. However, existing methods, i.e. the maximum separation method, only applies to limited microstructures and are highly dependent on user input. In an effort to develop reliable and statistical analysis methods, we explored the use of hierarchical density-based cluster analysis methods. We successfully applied it to complex microstructures. This approach is less dependent on subjective selection of parameters and exhibit significantly more accurate performance than the traditionally used maximum separation method. We also integrated an integrated density-based cluster analysis method and skeleton extraction to find dislocation loops/lines in APT data. We will provide a demonstration of the openly available interface on simulated and experimentally acquired datasets.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


A Review of Atom Probe Tomography Technology: The Present and Future
APT-based Stoichiometry Measurements of Single Crystal ThO2
APT for Atomic-scale Insights to the Origins of Materials Properties
Atom Probe Tomography of Refractory High Entropy Alloys
Atom Probe Tomography Study of Fission Products in Neutron Irradiated U-Mo Fuel
Characterization of Mechanical Properties of the A356 Cast Aluminum Alloy in Accordance with the Cluster Formation Behaviors at Different Aging Temperatures
Compositional Dependencies of Ni- and Fe-oxides to Experimental Parameters in Atom Probe Tomography
Coupled APT and TEM Investigation of Cu Assisted Nucleation of L12 Precipitates in FCC-based High Entropy Alloys
Elucidating Solute Clustering and Precipitation of Al-Cu-Mg-Ag-Si Model Alloys
Material Alterations in Intense Mechanical and Chemical Contacts
Morphological Classification of Dense Objects in Atom Probe Tomography Data
Nanoparticle Sample Preparation for Atom Probe Tomography: Chemical Fixation and Cryo-Fixation
Quantifying Compositional Uncertainty Arising from Peak Overlaps
Understanding Early Stages of Nanoscale Hydriding and Oxidation Mechanisms in Metallic Systems via Atom Probe Tomography and Multimodal Chemical Imaging

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