A5101809631- Welding Techniques and Residual Stresses
- Vacuum and Plasma Arcs
- Metallurgy and Material Forming
- Electrical Contact Performance and Analysis
- Intermetallics and Advanced Alloy Properties
- Laser and Thermal Forming Techniques
- Metal Forming Simulation Techniques
- Mechanical stress and fatigue analysis
- Optical Systems and Laser Technology
- Metal Alloys Wear and Properties
- Electrical Fault Detection and Protection
- MXene and MAX Phase Materials
- 3D Surveying and Cultural Heritage
- Advanced Optical Sensing Technologies
- High Entropy Alloys Studies
- Non-Destructive Testing Techniques
- Energetic Materials and Combustion
- Heat Transfer and Boiling Studies
- Advanced Control and Stabilization in Aerospace Systems
- Integrated Circuits and Semiconductor Failure Analysis
- Optical measurement and interference techniques
- Satellite Image Processing and Photogrammetry
- Adhesion, Friction, and Surface Interactions
- Industrial Engineering and Technologies
- High-Temperature Coating Behaviors
Beihang University
2022-2023
Beijing Institute of Aeronautical Materials
2016-2020
Institute of Industry Technology Guangzhou
2018
Chinese Academy of Sciences
2013-2018
Changshu Switch Manufacturing (China)
2011-2017
Yanshan University
2016-2017
The thermo-mechanical control processing (TMCP) of low carbon (C) Nb-Ti-containing HSLA steel with different cooling rates from 5 to 20 °C/s was simulated using a Gleeble 3500 system. samples’ microstructure characterized and the tensile properties measured. results show that mainly consisting quasi-polygonal ferrite (QPF), granular bainitic (GBF), martensite/austenite (M/A) constituent formed in each sample. Furthermore, accelerated led significant grain refinement QPF GBF, an increase...
The hot deformation behavior and microstructural evolution of Ti-44Al-5V-1Cr alloy were investigated by compression tests at temperatures 1000–1250 °C strain rates 0.001–1 s−1. It was indicated that the dependence peak stress on temperature rate could be accurately described a hyperbolic sine type equation. activation energy, Q, estimated to 632 kJ/mol. processing map developed different strains basis dynamic materials modeling Murty criteria. As result, instability zones occurred in regions...
Short-time withstanding current is a key parameter of air circuit breakers. Due to the structure multiple parallel contacts, outer movable conductors tilt and slide seriously when large short-circuit current. This paper aimed investigate contact behavior tilted contact. A new designed experimental setup measure minimum repulsion resistance developed. Contact force angle can also be measured adjusted. Based on results impression marks contact, it concluded that are increased tilted. During...
In the field of ultra high accuracy inertial measurement unit (IMU), pendulous integrating gyroscopic accelerometer (PIGA) has become a research hot spot due to its high-end performance. However, PIGA is sensitive angular velocity, and calibration process PIGA-based IMU will be very complicated, which makes online self-calibration difficult implement. To solve above problems, we proposed an method utilizing velocity observation. The main contributions this study are twofold: (1) An error...
Abstract The effect of Al content on the hot deformation behavior and microstructure evolution TiAl-6 (Cr, Nb, Ta) alloy was studied by compression tests. results show that when presented a low content, it contained greater percentage β + γ mixed structure at grain boundary, finer lamellar colony size. Under same conditions, reduction in lead to flow stress, but activation energy Q increased from 540 kJ mol −1 617 . increase boundary promoted rotation colony, thereby inhibiting twisting...
With measuring the arc current, voltage and images, high-current air commutation process across separated electrodes was investigated. It shows that existence of a short stable in gap may increase current time. According to energy balance column, conditions maintain were introduced effects limiting resistance on discussed.
The proposal of this paper is to establish a numerical model simulate mechanical, thermal, electric and magnetic behavior the electrical contact. coupling field uncoupled into two sub models: structural thermoelectric models. By using ANSYS software direct-coupling fields solved. ANSOFT applied compute repulsion force. Finally interpolation method used combine above models simulation results with considering effect
In this paper, an arc runner model is developed to study behaviors of the motion for different current levels and resistance runners. By using high speed CCD camera movements are observed influence resistor runners analyzed. According experiment results between parallel poles, certain configuration increase pole can reduce motion. However, with current, effect fades gradually. A simplified mathematical proposed explain reason delays Without considering fluid characteristic arc, further work...
The oxidation behavior of Ti60(AlCrNb)40, Ti60(AlCrSn)40, and Ti60(AlCrZr)40 alloys at 850 °C was studied using the oxidative weight gain method. XRD performed to analyze phase oxide layer. Further, SEM EDS were used cross-sectional morphology composition layer, effects alloying Nb, Sn, Zr on resistance Ti-based medium-entropy discussed. results showed that Ti60(AlCrNb)40 alloy had best resistance. Moreover, kinetics conformed parabolic law. Ti60(AlCrSn)40 exhibited behaviors in early stages...
To improve the stability accuracy and anti-interference capability of Fiber Optic Gyroscope (FOG) inertial platform, a Nonlinear Integral Fuzzy Sliding Mode Control (NIFSMC) method that can platform is proposed. Firstly, (NISMC) adopted to rapidly converge state loop equilibrium state. Secondly, this article combined fuzzy control exponential approach law. By designing rules, parameters law are adjusted timely. The stable improved. Finally, nonlinear integral sliding mode verified by...