A5030709901- Additive Manufacturing Materials and Processes
- Titanium Alloys Microstructure and Properties
- High Entropy Alloys Studies
- Welding Techniques and Residual Stresses
- Additive Manufacturing and 3D Printing Technologies
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Microstructure and Mechanical Properties of Steels
- Metal Alloys Wear and Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Solidification and crystal growth phenomena
- Aluminum Alloy Microstructure Properties
- Metallurgical Processes and Thermodynamics
- Thermography and Photoacoustic Techniques
- Metallurgy and Material Forming
- Nuclear Physics and Applications
- X-ray Diffraction in Crystallography
- Machine Learning in Materials Science
- nanoparticles nucleation surface interactions
- High-Temperature Coating Behaviors
- Plant Physiology and Cultivation Studies
- Crystallization and Solubility Studies
- Manufacturing Process and Optimization
Colorado School of Mines
2018-2024
National Institute of Standards and Technology
2024
Argonne National Laboratory
2022
Textile Research Institute
1946
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...
Magnitude and distribution of residual stresses in additively manufactured Ni-based superalloys may impact the mechanical performance as-fabricated parts. Though electron beam powder bed fusion (E-PBF) can produce components with minimal defects compared to laser directed energy deposition, variations them occur within complex geometry a component, due inherent thermal signatures evolution section modulus along build direction. This work reveals stress distribution, characterised from...
The continued development of metal additive manufacturing (AM) has expanded the engineering metallic alloys for which these processes may be applied, including beta-titanium with desirable strength-to-density ratios. To understand response to AM processing, solidification and microstructure evolution needs investigated. In particular, thermal gradients (Gs) velocities (Vs) experienced during are needed link processing development, columnar-to-equiaxed transition (CET). this work, in situ...
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Additive manufacturing has been around for many years, yet the underlying physics of thermal gradients, local pressure environment, and other non-steady state conditions are not fully understood. A Multi-University Research Initiative (MURI) is currently ongoing to measure liquid/solid solid/solid interface stabilities in AM Ti-6Al-4V. Samples were produced with different beamscanning strategies order study role gradients on resulting microstructure. The motivation determine which...
Haynes 282 is a precipitation-strengthened nickel based superalloy that already has shown promise in high temperature industrial applications due to its unique combination of improved fabricability, excellent thermal stability, creep resistance, and corrosion resistance. Improved weldability makes it promising candidate for fabrication using the electron beam melting-powder bed fusion (PBF-EB) methodology additive manufacturing (AM). However, correlation between process, structure property...
Abstract Chills are used in the production of metal castings as a thermal aid to promote directional solidification casted sections. This study will review microstructure and circumstances internal chill interface where is intended be incorporated into structure cast section. The conditions for coherency steel sections from 25 50mm shown. Solidification proceeds away growing maximum thickness then melting back original geometry. Furthermore, it shown that promoting section prior complete can...