A5044889520- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Additive Manufacturing Materials and Processes
- Metal and Thin Film Mechanics
- Aluminum Alloys Composites Properties
- Titanium Alloys Microstructure and Properties
- Aluminum Alloy Microstructure Properties
- High Entropy Alloys Studies
- Advanced Battery Technologies Research
- Non-Destructive Testing Techniques
- Advanced materials and composites
- Hydrogen embrittlement and corrosion behaviors in metals
- Multilevel Inverters and Converters
- Magnesium Alloys: Properties and Applications
- Advanced DC-DC Converters
- Electric and Hybrid Vehicle Technologies
- Advanced Algorithms and Applications
- Intermetallics and Advanced Alloy Properties
- Additive Manufacturing and 3D Printing Technologies
- Embedded Systems and FPGA Design
- Microstructure and Mechanical Properties of Steels
- Power Systems and Renewable Energy
- Engineering Applied Research
- Advanced ceramic materials synthesis
- Silicon Carbide Semiconductor Technologies
Beihang University
2015-2024
Ministry of Industry and Information Technology
2017-2018
China Astronaut Research and Training Center
2010
In order to build a better understanding of the relationship between depositing mode and porosity, microstructure, properties in wire + arc additive manufacturing (WAAM) 2319-Al components, several Al-6.3%Cu deposits were produced by WAAM technique with cold metal transfer (CMT) variants, pulsed CMT (CMT-P) advanced (CMT-ADV). Thin walls blocks selected as paths make samples. Porosity, microstructure micro hardness these samples investigated. Compared CMT-P thin wall mode, CMT-ADV block...
WADED Al-Mg and Al-Mg-Sc-Zr aluminium alloy thin-wall components were produced. Heat treatment (350°C aging for 4 h) was further conducted. The effects of Sc/Zr addition on porosity, microstructure, mechanical properties corrosion behaviour investigated. With adding, pore area fraction decreased from 0.208 to 0.005% grain size 84.34 19.54 μm. In component, microstructure showed refined equiaxed grains. Mechanical improved with 360 MPa ultimate tensile strength (UTS), 185 yield strength,...
The increasing demand for achieving high-efficiency and high-quality medium-thick aluminium alloy welded structures, especially large scale aerospace components, presents an urgent challenge to the conventional TIG arc welding process. This work proposed a novel double-pulsed variable polarity tungsten inert gas (DP-VPTIG) arc, in which square wave current was simultaneously modulated into ultrasonic frequency (20–80 kHz) low (0.5–10 Hz) pulses. Full penetration welds of 6 mm thick AA2219...
Magnesium rare-earth (Mg-RE) alloys have broad prospects for lightweight applications in the aerospace industry. Rapid manufacturing of large-sized Mg-RE alloy components is essential to promote their engineering applications. In this work, a directed energy deposition employing an ultrasonic frequency pulsed arc as thermal applied fabricate high-quality formed Mg-6Gd-3Y-0.5Zr (wt.%) single-pass multilayer component. The microstructural evolution during and post-forming heat treatment...
The further developments of additive manufacturing (AM) provides a possibility for Ti6Al4V and its functionally graded materials (FGMs), but limits applications due to low ductility, microhardness poor wear resistance. key lies in the presence microstructures such as epitaxial columnar β-grain orientation heterogeneous phase distribution AM Ti6Al4V, well interfacial bonding problems (intermetallic phases, delamination, cracking) FGMs. In order address these fundamental intra inter-layer...