A5088483885- Additive Manufacturing Materials and Processes
- Hydrogen embrittlement and corrosion behaviors in metals
- Welding Techniques and Residual Stresses
- Metal and Thin Film Mechanics
- Particle Dynamics in Fluid Flows
- Advanced materials and composites
- Aluminum Alloys Composites Properties
- Corrosion Behavior and Inhibition
- Laser-induced spectroscopy and plasma
- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Titanium Alloys Microstructure and Properties
- Bone Tissue Engineering Materials
Southeast University
2022-2024
Powder-based laser direct metal deposition (DMD), one of the directed energy (DED) techniques, was applied in air and underwater to repair pre-machined NV E690 steel plates. Systematic investigations on effects environment ambient pressures (0.01 MPa–0.35 MPa) microstructure evolution, phase transformation, mechanical properties were conducted. The water quenching effect (UDMD) refined grain size increased dislocation density lath martensite content deposited material. theoretical models...
The corrosion behavior of 316LN nuclear steel repaired by underwater laser directed metal deposition (UDMD) technique at a simulated water depth 30 m and in-air (in-air DMD) was investigated. results indicate that the UDMD sample contains refined grain size, higher dislocation density, more oxide inclusions, M7C3 in comparison with DMD samples. A passive film containing Cr2O3, Fe2O3, MoO3 formed on surface all samples 3.5 wt% NaCl solution. pitting were different from due to carbide,...
Abstract Laser direct metal deposition (DMD) can supply a new method in the fields of surface modification and near-net forming. The powder flow behavior its convergence characteristics play crucial role quality during DMD process. In this research, k - ε turbulence model based on Computational Fluid Dynamics (CFD) modeling was innovatively employed to establish numerical gas-powder flow. Then, Dense Discrete Phase Model (DDPM) utilized coupling accurately calculate collision between...
The interfacial structures of TiC(110)/γ-Ni(110) were established by means first principles calculations, and the Case-IV interface among them was chosen as most stable termination types based on work adhesion energy. Effects alloying elements X (Cr,Fe Mo) analyzed from aspects segregation energy, stability, electronic properties, fracture mechanism heterogeneous nucleation. stability researched adhesive bonding characteristics revealed charge density difference layer-projected DOS,...