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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Imaging
Presentation Title Thermal Stability of fcc-bcc Nanolaminates Containing 3D Interfaces
Author(s) Justin Y. Cheng, Zezhou Li, Shuozhi Xu, Jon K. Baldwin, Mauricio De Leo, Irene J. Beyerlein, Khalid Hattar, Nathan A. Mara
On-Site Speaker (Planned) Justin Y. Cheng
Abstract Scope Bimetallic nanolaminates have been used to study the influence of interface energetics on static annealing-induced microstructure and mechanical property evolution in nanocrystalline alloys. It has been shown that PVD-synthesized Cu/Nb nanolaminates with atomically sharp heterophase interfaces and layer thicknesses above a few tens of nm maintain lamellar microstructures and retain as-deposited nanohardness after annealing. However, this degree of thermomechanical stability is not achieved when nanolaminate layer thickness drops below a few tens of nanometers. We show here using ex situ annealing, in situ TEM annealing, and nanoindentation that introduction of 3D interfaces containing chemical and structural heterogeneities in all spatial dimensions in Cu/Nb nanolaminates allows for retention of lamellar microstructure and associated nanohardness after annealing up to 600C for 1 hr. This finding demonstrates a new method of engineering thermal stability of thermodynamically metastable structures in nanolamellar composites.
Proceedings Inclusion? Planned:
Keywords Nanotechnology, Thin Films and Interfaces, High-Temperature Materials

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

4D Microstructural Evolution of Bismuth (Bi) Phase during Solidification of Sn-58Bi Solder
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Energy Absorption Properties of Open-Cell Rhombic Dodecahedron Cellular Lattice Structures Under Shock Compression
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High-Temperature Wetting of Calcium Alloys and Molten Salts
In-situ Monitoring and Post Operando Analysis of Additively Manufacturing Lunar Regolith Simulants Parts
In-situ TEM Study of Rapidly Solidifed AlCuLi Based Alloys
In-situ Visualization of Retrograde Melting Phenomenon During Solidification of Boron-bearing Steels
L-9: In-situ Magnetic Computed Tomography for Additive Manufacturing
Machine Learning for In-situ Detection of Local Heat Accumulation in Additive Manufacturing
Mapping the Melt Pool Variability in L-PBF Additive Manufacturing by High-Speed Imaging
Microstructure Evolution during Laser-based Powder Bed Fusion Studied by Operando X-ray Radiography
Prediction of Laser Absorptivity from Synchrotron X-ray Images Using Deep Convolutional Neural Networks
Real-time Plasmon-Enhanced Colorimetric Imaging
Real Time Imaging of Laser Melting and Re-Solidification
Recent Advances in Ultrafast Real-time Imaging of Sonoprocessing Advanced Materials
Study of Fracture Behaviors of Epoxy-Alumina Composite Using Mechanical Testing Coupled with Micro-CT
The Influence of Temperature on Strength: Are Concentrated BCC Alloys Different than Elements and Dilute Alloys?
Thermal Stability of fcc-bcc Nanolaminates Containing 3D Interfaces
Three-dimensional Assessment of Strain Localization at the Sub-grain Level of a Ni-based Superalloy at Low and High Temperature Using Laser Scanning Confocal Microscopy
Visualization of Molten Slag Suspension by Electrical Impedance Tomography

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