A5009151411- High-pressure geophysics and materials
- Laser-Plasma Interactions and Diagnostics
- High-Velocity Impact and Material Behavior
- Energetic Materials and Combustion
- Electromagnetic Launch and Propulsion Technology
- High Entropy Alloys Studies
- Pulsed Power Technology Applications
- High-Temperature Coating Behaviors
- Diamond and Carbon-based Materials Research
- Intermetallics and Advanced Alloy Properties
- Electromagnetic Effects on Materials
- Ferroelectric and Piezoelectric Materials
- Particle accelerators and beam dynamics
- Rock Mechanics and Modeling
- Magnetic confinement fusion research
- Boron and Carbon Nanomaterials Research
- Glass properties and applications
- Microstructure and mechanical properties
- Multiferroics and related materials
- High Temperature Alloys and Creep
- Advanced Photocatalysis Techniques
- Electrical and Thermal Properties of Materials
- Structural Response to Dynamic Loads
- Metallic Glasses and Amorphous Alloys
- Crystallography and Radiation Phenomena
China Academy of Engineering Physics
2013-2025
Institute of Fluid Physics
2014-2021
Institute of High Energy Physics
2014-2018
National Academy Foundation
2012
It is of substantial scientific significance and practical value to reveal understand the multiscale mechanical properties intrinsic mechanisms medium-entropy alloys (MEAs) under high strain rates pressures. In this study, responses deformation an equiatomic CoCrNi MEA are investigated utilizing magnetically driven ramp wave compression (RWC) with a rate 105 s−1. The demonstrates excellent dynamic yield strength RWC compared other advanced materials. Multiscale characterizations that grain...
Kinetic impact is an effective way to deal with threatening asteroids, and the momentum transfer coefficient during process indicator for evaluating effect. This article based on use of Smoothed Particle Hydrodynamics (SPH) method establish a simulation model high-speed flying discs granite targets, obtain parameters such as shape splashing material distribution target damage process. An analysis was conducted influence different velocities kinetic energy coefficient, it found that increased...
A pulsed power generator CQ-4 was developed to characterize dynamic behaviors of materials under ramp wave loading, and launch high velocity flyer plates for shock compression hypervelocity impact experiments structures at Institute Fluid Physics, China Academy Engineering Physics. is composed twenty capacitor primary discharge switch modules with total capacitance 32μF rated charging voltage 100 kV, the storage energy transmitted by two top bottom parallel aluminum insulated twelve layers...
High velocity flyer plates with good flatness and some thickness have being widely used to the field of shock physics for characterizations materials under dynamical loading. The techniques magnetically driven high-velocity are further researched based on our pulsed power generators CQ-4 results got Sandia's Z machine. With large current several mega-amperes, loading surface electrode panel will suffer acute phase transitions caused from magnetic diffusion Joule heating, change time. In...
Photocatalysts with suitable nanostructures and excellent photocatalytic activity driven by solar light are in great demand for rapidly eliminating the organic pollutants from wastewater. In order to improve activities, three main factors should be considered, including band gap, structure, morphologies. Most of previous studies only focused on manipulating one factor, such as gap element doping. However, enhancing activities designing structure morphologies challenging, due difficulity...
With large-scale non-equilibrium molecular dynamics simulations and in situ x-ray diffraction analysis, we conducted a systematic investigation into the effects of pre-existing shear strain (γxy) on shock response single crystal iron. Our findings reveal significant γxy deformation structure during loading, leading to noticeable alterations propagation waves. Specifically, elastic stage, presence results reduction strength, consequently diminishing magnitude lattice (εe). In plastic...
Numerical simulations of metallic foil electrically exploding provide the feasibility to analyze process better and then suggest new ideas optimize design experiments some other applications. Incorporating with a tabular equation state Burgess resistivity model in which multiphases are covered unified set modified coefficients for aluminum (or copper) is used, 1-D code [namely, program (EEP)] based on magnetohydrodynamics has been developed calculate used electric guns evolution correlative...
Dynamic behaviors of Zr51Ti5Ni10Cu25Al9 bulk metallic glass were investigated using electric gun and magnetically driven isentropic compression device which provide shock ramp wave loading respectively. Double-wave structure was observed under while three-wave in 0 ∼ 18GPa. The HEL is 8.97 ± 0.61GPa IEL 8.8 0.3GPa, Strength estimated from 5.0 0.3GPa the strength 3.6 0.1GPa. Shock velocity versus particle curve appears to be bilinear a kink at about Lagrangian sound speed exhibits two...
A high current pulsed power generator CQ-3-MMAF (Multi-Modules Assembly Facility, MMAF) was developed for material dynamics experiments under ramp wave and shock loadings at the Institute of Fluid Physics (IFP), which can deliver 3 MA peak to a strip-line load. The rise time is 470 ns (10%-90%). Different from previous CQ-4 IFP, energy transmitted by hundreds co-axial voltage cables with low impedance 18.6 mΩ loss, then are reduced converted tens into vacuum chamber cable connector,...
Wide-angle X-ray diffraction on large-scale laser facility is a well-established experimental method, which used to study the shock response of single crystal materials by recording X-rays diffracted from numerous lattice planes. We present three-dimensional graphical method for extracting physical understanding raw data in shocked experiments. This advances beyond previous iterative process turning abstract theories physics into mathematic issues, providing visualization and quick...
This paper reports on the development of a magnetically driven high-velocity implosion experiment conducted CQ-3 facility, compact pulsed power generator with load current 2.1 MA. The generates high Lorentz force between inner and outer liners made from 2024 aluminum. Equally positioned photonic Doppler velocimetry probes record liner velocities. In CQ3-Shot137, imploded radial converging velocity 6.57 km/s while expanded at much lower velocity. One-dimensional magneto-hydrodynamics...
The technique of magnetically driven quasi-isentropic compression is a new experimental technology which can generate dynamic ramp compression, and its load path lies between the quasi-static (isothermal) shock (adiabatic process), it bridge to contact two traditional loading techniques. In this paper, phase transition experiments iron were done under on facility CQ-4, effect acoustic impedance interface velocity was analyzed. Simulation with multi-phase equation state also analyze...
Based on the 1-D elastic-plastic reactive hydrodynamic code Simplified Stretch Sin, a magnetohydrodynamic (MHD) version SSS/MHD has been developed. The new is of multifield coupling, making use Resistance-Inductance-Capacitance circuit equations related to loading currents and others. To calculate MHD variables consistently simultaneously, basis Faraday's law, relations between magnetic flux in configuration cavities, variation total back electromotive force, an iteration procedure are...
Accurate loading-unloading sound speed of materials is indispensable for material equation states and strength calculation at high pressure. In this paper, we propose an approach to calculate the under ramp wave compression directly based on characteristic theory. The feasibility method validated numerically, it applied copper tantalum compression. Calculated speeds agree well with results other methods reported in literatures, comparison show that concise efficient.
This paper introduces a novel method for the three-dimensional characterization of flyers based on microscopic photonic Doppler velocimetry (PDV) velocity field measurements. By strategically positioning 56 PDV measurement spots within circle 0.50 mm diameter at an interval approximately 58 μm, we achieve spatially resolved measurements history flyer during its flight barrel and subsequent impact transparent window. Crucial data, such as displacement history, time, pulse duration, can be...
In the experiments of measuring strength materials under ramp compression, accurately determining in situ particle velocity is crucial for calculating material sound speed during loading–unloading path and high pressure. This paper proposes a machine learning approach that utilizes Long Short-Term Memory (LSTM) neural networks Bayesian optimization algorithms to enhance analysis data from compression measurement experiments. method leverages LSTM uncover complex relationship between rear...