A5081217940- Additive Manufacturing Materials and Processes
- Welding Techniques and Residual Stresses
- Microstructure and Mechanical Properties of Steels
- Additive Manufacturing and 3D Printing Technologies
- Titanium Alloys Microstructure and Properties
- Metallurgy and Material Forming
- Advanced materials and composites
- Advanced Welding Techniques Analysis
- Thermography and Photoacoustic Techniques
- Machine Fault Diagnosis Techniques
- High Entropy Alloys Studies
- Aluminum Alloy Microstructure Properties
- Hydrogen embrittlement and corrosion behaviors in metals
Nanjing University of Science and Technology
2021-2024
Ministry of Industry and Information Technology
2021-2022
The 17-4 precipitation-hardened (PH) stainless steel was prepared by laser-powder bed fusion (L-PBF), and the effects of different aging temperatures on microstructures properties 17-4PH were systematically studied. results show that laser powder requires a solid solution treatment in order to obtain lath martensite structure, then niobium carbides ε-Cu phase nanoparticles precipitated improve strength steel. When heat parameter is 450°C/5h, mechanical better, ultimate tensile (UTS)...
The titanium alloy components utilized in the aviation field are typically large size and possess complex structures. By utilizing multiple additive manufacturing processes, precision efficiency requirements of production can be met. We investigated hybrid Ti-6Al-4V using a combination cold metal transfer (CMTAM) laser deposition (LMD), as well feasibility CMT-LMD process for fabricating components. Microstructural examinations, tensile testing coupled with digital image correlation dynamic...
The single-pass multi-layer depositing strategy is usually used to fabricate thin-wall structures with wire and arc additive manufacturing (WAAM) technology. Various deposited wall thicknesses often lead a change in shrinkage the thickness direction, which affects shape stability, even microstructure properties. To systematically study effect of (δ) on 3D numerical models were established, varying from 1 14 mm during WAAM process. characteristics shape, temperature field, velocity current...
Welding experiments were conducted under different currents for single-pass butt welding of high-strength steel flat plates. The microstructure welded joints was characterized using OM, SEM, and EBSD, the process numerically simulated a finite element method. According to grain size obtained by electron microscope characterization temperature data simulation, mechanical properties coarse fine areas heat-affected zone predicted material property simulation software. Finally, results verified...