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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 Coupled APT and TEM Investigation of Cu Assisted Nucleation of L12 Precipitates in FCC-based High Entropy Alloys
Author(s) Bharat Gwalani, Sriswaroop Dasari, Vishal Soni, Rajarshi Banerjee
On-Site Speaker (Planned) Rajarshi Banerjee
Abstract Scope Second phase precipitation in high entropy alloys (HEAs) or complex concentrated alloys (CCAs) can be rather complex due to the multi-component system coupled with the competition between multiple possible phases. This study will focus on Cu clustering and its impact on L12 precipitation in FCC-based high entropy alloys (HEAs), Al0.3CuCrFeNi2 and Al0.3Cu0.3Ti0.2CrFeNi. Detailed characterization via coupling of APT, SEM, and TEM reveal novel insights into Cu clustering within the FCC matrix of these HEAs, leading to heterogeneous nucleation sites for the gamma prime precipitates. The subsequent partitioning of Cu into the gamma prime precipitates indicates their stabilization due to Cu addition. The role of Cu revealed by this study can be employed in the design of precipitation strengthened HEAs, as well as in a more general sense applied to other types of superalloys, with the objective of potentially enhancing their mechanical properties at room and elevated temperatures.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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