A5066879150- Aluminum Alloy Microstructure Properties
- High Entropy Alloys Studies
- Microstructure and mechanical properties
- Additive Manufacturing Materials and Processes
- High-Temperature Coating Behaviors
- Transition Metal Oxide Nanomaterials
- Semiconductor materials and devices
- Catalysis and Oxidation Reactions
- Intermetallics and Advanced Alloy Properties
- Advanced Antenna and Metasurface Technologies
- Thin-Film Transistor Technologies
- Microstructure and Mechanical Properties of Steels
- High Temperature Alloys and Creep
- Advanced materials and composites
- Gas Sensing Nanomaterials and Sensors
- Metamaterials and Metasurfaces Applications
- Diamond and Carbon-based Materials Research
- Metallurgical and Alloy Processes
- Aluminum Alloys Composites Properties
- X-ray Diffraction in Crystallography
Ames National Laboratory
2024
Government of the United States of America
2024
Indian Institute of Technology Kanpur
2015-2019
Abstract The far-from-equilibrium solidification during additive manufacturing often creates large residual stresses that induce solid-state cracking. Here we present a strategy to suppress cracking in an additively manufactured AlCrFe 2 Ni high-entropy alloy via engineering phase transformation pathway. We investigate the microstructures formed laser powder-bed fusion and directed energy deposition, encompassing broad range of cooling rates. At high rates (10 4 −10 6 K/s), observe...
We report the synthesis of high quality vanadium dioxide (VO2) thin films by a novel spray pyrolysis technique, namely ultrasonic nebulized aqueous combustion mixture (UNSPACM). This simple and cost effective two step process involves V2O5 film on an LaAlO3 substrate followed controlled reduction to form single phase VO2. The formation M1 (P21/c) is confirmed Raman spectroscopic studies. A thermally activated metal–insulator transition (MIT) was observed at 61 C, where resistivity changes...
Abstract The decrease in the X-ray diffraction Bragg peak intensity from concentrated multicomponent alloys (CMA), has been modeled literature akin to effect of temperature. In current work, experiments and computations are used comprehend atomic disorder CMA on peaks powder patterns. Ni–Co–Fe–Cr–Mn Cu–Ni–Co–Fe–V have as model systems for study. It is proved that not insignificant, but anomalous either. A recipe evolved compare intensities across a CMA. demonstrated it incorrect an increase...
The metallurgy and materials communities have long known exploited fundamental links between chemical structural ordering in metallic solids their mechanical properties. highest reported strength achievable through the combination of multiple metals (alloying) has rapidly climbed given rise to new classifications with extraordinary Metallic glasses high-entropy alloys are two limiting examples how tailored order can be used manipulate behavior. Here, we show that complex electronic-structure...
Density-functional theory (DFT) is used to identify phase-equilibria in multi-principal-element and high-entropy alloys (MPEAs/HEAs), including duplex-phase eutectic microstructures. A combination of composition-dependent formation energy electronic-structure-based ordering parameters were a transition from FCC BCC favoring mixtures, these predictions experimentally validated the Al-Co-Cr-Cu-Fe-Ni system. This work establishes pathway for design optimization next-generation multiphase...
The metallurgy and materials communities have long known exploited fundamental links between chemical structural ordering in metallic solids their mechanical properties. highest reported strength achievable through the combination of multiple metals (alloying) has rapidly climbed given rise to new classifications with extraordinary Metallic glasses high-entropy alloys are two limiting examples how tailored order can be used manipulate behavior. Here, we show that complex electronic-structure...
Single-photon emitting devices have been identified as having relevant roles in applications quantum technologies, ranging from cryptography, computation well single-photon metrology. Recent observations demonstrated that bulk and nanocrystals of silicon-carbide (SiC) can host room-temperature stable bright single emitters. Here we study SiC ultra-thin-films deposited on silicon (Si) substrate using pulsed laser deposition (PLD), towards therein integration vacancy related color centres. The...