A5102004537- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Additive Manufacturing Materials and Processes
- Intermetallics and Advanced Alloy Properties
- Railway Engineering and Dynamics
- Gear and Bearing Dynamics Analysis
- Metal and Thin Film Mechanics
- Tribology and Lubrication Engineering
- Aerodynamics and Fluid Dynamics Research
- Magnetic and transport properties of perovskites and related materials
- Advanced materials and composites
- Thermal Expansion and Ionic Conductivity
- Metallic Glasses and Amorphous Alloys
- Metal Alloys Wear and Properties
- Civil and Geotechnical Engineering Research
- Engineering Education and Curriculum Development
- Multiferroics and related materials
- Geotechnical Engineering and Analysis
- Urban Heat Island Mitigation
- Ferroelectric and Piezoelectric Materials
- Adhesion, Friction, and Surface Interactions
- Cryospheric studies and observations
- Railway Systems and Energy Efficiency
- Wind and Air Flow Studies
- Design Education and Practice
Kunming University of Science and Technology
2023-2025
Southwest Jiaotong University
2010-2025
To enhance the friction and wear properties of Ti–6Al–4V, AlTiVCrNb lightweight refractory high entropy alloy coating was applied to a Ti–6Al–4V substrate by laser cladding. The microstructure investigated through scanning electron microscopy, X-ray diffraction, transmission microscopy. results demonstrate that coatings are metallurgically bonded substrate, with Ti content comprises disordered BCC phases, laves reinforced diffusely distributed Ti2AlNb nanophases. microhardness measures...
The high-amplitude and high-frequency wheel–rail impacts excited by wheel flat result in severe contact friction axle-box bearing (ABB), the can cause a temperature rise or even structural damage of ABB. To this end, thermal analysis model considering vehicle operation environment is proposed to analyze characteristics Various coupling dynamics effects between vehicle–track system ABB are synergistically integrated. heat conduction, convection, radiation various components also integrated...
To improve high-temperature oxidation resistance for Ti6Al4V alloy, AlxCoCrCuyFeNi (x = 0, 0.3, 0.5, 0.7, 1.0; y 1.0, x + 1.0) high-entropy alloy (HEA) coatings were prepared on the substrate by a laser cladding technique. The results show that mainly composed of FCC, BCC, and Ti-rich phases. Severe segregation Cu element occurred in CoCrCuFeNi HEA as Cu-rich phase (FCC2). phases decreased with decreasing content completely disappeared until Al reached 1.0. microhardnesses Cu1.0, Cu0.7Al0.3,...
To accurately predict the long-term wind-induced snowdrift on building roofs, this study developed a modified numerical model within multistage quasi-steady simulation method. A novel method was introduced to estimate prototype blowing snow duration based wind tunnel experimental data, and boundary mesh adaptive technique combined with bounded radial basis function interpolation implemented track dynamic changes during drifting. Additionally, influence of temporal parameters, including...
This present study investigates wheel polygonisation growth on China's high-speed trains from the perspective of multiple wheelsets/track coupling vibration. Two theoretical models were established: a simplified linear model for polygonal wear trend analysis in frequency domain, and detailed nonlinear reproducing time domain. The simulation results suggest that both amplitude–frequency phase-frequency characteristics play vital roles development wear. rail localised bending resonances...
Rock sheds have been widely used to protect against rockfall. Traditionally, a cushion layer is placed on the top of rock shed reduce impact force and dissipate energy. However, heavy layers lead high dead loads increased construction costs. This paper discusses concept an impact‐resilient flexible buffer structure. On basis that concept, it also proposes structure mainly composed springs, ring nets, spring rods, support ropes, which can be replace traditional for rockfall protection....
The axle box bearing serves as a critical rotational component for high-speed trains. Thus, it is of great significance to obtain accurate loading conditions bearings its reliability design. In this study, bearing-vehicle coupled system dynamic model, consisting an equivalent model characterized by the time-varying stiffness in bearing, nonlinear train and slab track developed. validity proposed demonstrated comparing simulated results with those obtained field test literature, respectively....
This work uses first-principles calculations to investigate the phase stability, thermophysical and mechanical properties of refractory high entropy alloys (RHEAs) at finite temperatures. On basis plane wave quasi-potential density functional theory, construct structure model a solid solution. The TiMoNbX (X = Cr, Ta, Cr Ta) RHEAs have been determined preserve single body-centered cubic solution by equilibrium lattice parameters elastic modulus are consistent with experimental data obtained...
Utilizing first-principles calculations, this work investigates the phase stability, thermo-physical, and mechanical properties of refractory high entropy alloys (RHEAs) at a prohibited temperature. On basis plane wave quasi-potential density functional theory, construct structure model solid solution. The TiMoNbX (X = Cr, Ta CrTa) RHEAs have been determined to preserve single BCC solution by calculations equilibrium lattice parameters elastic modulus are consistent with experimental data...
According to the in-situ reaction mechanism of Ti, Al, Si mixed powders and Ti-Al-Si ternary phase diagram, two kinds alloy systems with an atomic ratio Ti: Al: Si=41:41:18 Si=35:35:30 was designed. The composite coatings were synthesized by laser cladding on Ti6Al4V titanium (TC4) surface. microstructure composition coating characterized X-ray diffraction (XRD) scanning electron microscopy (SEM). microhardness corrosion resistance investigated tester electrochemical workstation....