A5011967052- Solidification and crystal growth phenomena
- Aluminum Alloy Microstructure Properties
- nanoparticles nucleation surface interactions
- Metallurgy and Material Forming
- Additive Manufacturing Materials and Processes
- Metallurgical Processes and Thermodynamics
- High Entropy Alloys Studies
- High Temperature Alloys and Creep
- Metallic Glasses and Amorphous Alloys
- Crystallization and Solubility Studies
- Fluid Dynamics and Thin Films
- High-Temperature Coating Behaviors
- Advanced Materials Characterization Techniques
- Theoretical and Computational Physics
- Magnesium Alloys: Properties and Applications
- Materials Engineering and Processing
- Microstructure and Mechanical Properties of Steels
- Titanium Alloys Microstructure and Properties
- Intermetallics and Advanced Alloy Properties
- Particle Detector Development and Performance
- Space Technology and Applications
- Additive Manufacturing and 3D Printing Technologies
- Microstructure and mechanical properties
- MXene and MAX Phase Materials
- Integrated Circuits and Semiconductor Failure Analysis
IMDEA Materials
2017-2024
Los Alamos National Laboratory
2015-2020
SLAC National Accelerator Laboratory
2020
Colorado School of Mines
2020
Argonne National Laboratory
2020
Madrid Institute for Advanced Studies
2018
Northeastern University
2013-2016
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2011-2012
École Nationale Supérieure des Mines de Paris
2009-2012
Centre National de la Recherche Scientifique
2009-2012
Understanding rapid solidification behavior at velocities relevant to additive manufacturing (AM) is critical controlling microstructure selection. Although in-situ visualization of dynamics now possible, systematic studies under AM conditions with microstructural outcomes compared theory remain lacking. Here we measure solid-liquid interface Ni-Mo-Al alloy single crystals synchrotron X-ray imaging, characterize the microstructures, and show discrepancies classical theories regarding onset...
We report results of directional solidification experiments conducted on board the International Space Station and quantitative phase-field modeling those experiments. The image for first time in situ spatially extended dynamics three-dimensional cellular array patterns formed under microgravity conditions where fluid flow is suppressed. Experiments simulations reveal existence oscillatory breathing modes with periods several 10's minutes. Oscillating cells are usually noncoherent due to...
Additive manufacturing of Ti-6Al-4 V alloy via laser powder-bed fusion leads to non-equilibrium α′ martensitic microstructures, with high strength but poor ductility and toughness. These properties may be modified by heat treatments, whereby the phase decomposes into equilibrium α+β structures, while possibly conserving microstructural features length scales lath structure. Here, we combine experimental computational methods explore kinetics martensite decomposition. Experiments rely on...
The authors report on the oscillation patterns of rounded structures formed at solid-liquid interface in directional solidification, by performing experiments gravity-reduced conditions aboard International Space Station. They complement their observations with a phase-field theoretical approach that successfully reproduces main feature observations, namely onset so-called breathing mode that, for large samples, does not exhibit long-ranged coherence.
X-ray imaging, which permits the microscopic visualization of metal alloy solidification dynamics, can be coupled with controlled to create microstructures by design. This x-ray image shows a process-derived composite microstructure being made from eutectic Al-17.1 at.%Cu successive and remelting steps. Controlling structure or is challenging, but has significant technological implications for casting crystal growth. Here, we couple synchrotron imaging visualize growth stray crystals in...