A5100338829- Microstructure and mechanical properties
- High-Temperature Coating Behaviors
- Metal and Thin Film Mechanics
- Microstructure and Mechanical Properties of Steels
- High Entropy Alloys Studies
- High Temperature Alloys and Creep
- Heat Transfer and Boiling Studies
- Heat Transfer and Optimization
- Phase Change Materials Research
- Advanced materials and composites
- Hydrogen embrittlement and corrosion behaviors in metals
- Aluminum Alloys Composites Properties
- Metallurgy and Material Forming
- Metal Alloys Wear and Properties
- Additive Manufacturing Materials and Processes
- Surface Treatment and Residual Stress
- Freezing and Crystallization Processes
- Spinal Cord Injury Research
- Advanced Surface Polishing Techniques
- Fluid Dynamics and Thin Films
- Advanced Radiotherapy Techniques
- Nuclear Engineering Thermal-Hydraulics
- Spinal Fractures and Fixation Techniques
- Electrodeposition and Electroless Coatings
- Cervical and Thoracic Myelopathy
Xi'an Jiaotong University
2008-2024
Johns Hopkins University
2024
Xinjiang University
2024
State Key Laboratory of Electrical Insulation and Power Equipment
2024
KTH Royal Institute of Technology
2024
Hefei University of Technology
2009-2024
Yanshan University
2023
Chengdu Fifth People's Hospital
2023
Jilin University
2021-2022
Nanjing Tech University
2021-2022
Deformation induced grain growth has been widely reported in nanocrystalline materials. However, the mechanism remains an open question. This study applies high-pressure torsion to severely deform bulk Ni-20 wt % Fe disks and uses transmission electron microscopy characterize process. Our results provide solid evidence suggesting that high pressure is achieved primarily via rotation for grains much smaller than 100 nm. Dislocations are mainly seen at small-angle subgrain boundaries during...
High-pressure torsion (HPT) induced dislocation density evolution in a nanocrystalline Ni-20 wt %Fe alloy was investigated using x-ray diffraction and transmission electron microscopy. Results suggest that the is fundamentally different from coarse-grained materials. The HPT process initially reduces within grains produces large number of dislocations located at small-angle subgrain boundaries are formed via grain rotation coalescence. Continuing deformation eliminates but significantly...
Amorphous films of GeTe, Sb2Te3, and Ge2Sb2Te5 were grown to thicknesses 0.3–3μm using rf sputtering. The optical properties these are influenced by the presence oxygen impurities. absorption edge in glasses is sometimes broader than “standard” chalcogenide glasses, such as GeSe2 or As2Se3. This result implies either that valance band consists highly strained bonds large densities defects exist. In some samples, there exists an electron paramagnetic resonance signal absence any excitation,...
A benchmark activity on two-fluid simulations of high-pressure boiling upward flows in a pipe is performed by 12 participants using different MCFD (Multiphase Computational Fluid Dynamics) codes and closure relationships. More than 30 conditions from DEBORA experiment conducted CEA are considered. Each case characterised the flow rate, inlet temperature, wall heat flux outlet pressure. High-pressure Freon (R12) at 14 bar 26 boiled 19.2mm heated over 3.5m. Flow rates range 2000 kg m−2 s−1 to...
Nanotwinned copper (nt-Cu) shows a broad application prospects as interconnection materials in integrated circuit industry, since it combines the excellent mechanical and electrical properties. However, formation growth behavior of twin lamellae pulse electrodeposited films are not fully understood. In this work, series electroplated prepared by verifying electroplating parameters microstructures analyzed using scanning electron microscope (SEM) transmission (TEM). The surface morphology...
FeCoNiCrAl0.8Cu0.5Si0.5 high-entropy alloys were fabricated using vacuum induction melting and laser deposition processes, followed by a comparison of the structural mechanical properties two distinct sample types. The as-cast alloy is comprised BCC1, BCC2, Cr3Si phases, while laser-deposited primarily features BCC1 BCC2 phases. Microstructural analysis revealed that exhibits dendritic morphology with secondary arms densely packed grains, displays structure without formation granular...
A380-Yb (Ytterbium) alloy was prepared by the ultrasonic melting casting method, and effects of hot extrusion on microstructure wear properties were studied. The results indicate that addition rare earth Yb can refine matrix alloy. After (extrusion ratio 22.56) as-cast alloy, secondary phase in its further refined distribution became more uniform. EBSD (electron backscatter diffraction) organizational analysis shows average GND (geometrically necessary dislocation) density extruded aluminum...
Microstructure, microhardness and tribological properties of laser hardened GCr15 steel were investigated in this paper. The wear resistance under lubricated sliding conditions was compared between specimens treated with those conventionally hardened. surface-quenched slightly better due to the effects microstructure hardening, high hardness toughness, rate (in order 10-6mg/Nm) lower than that specimens. At steady state, frictional coefficient laser-treated samples had no obvious difference...
Fe-30Mn-0.05C steel specimens with cold-rolled, partially recrystallized, fine-grained, and coarse-grained microstructures were fabricated by means of 80% cold rolling followed annealing at 550–1000 °C. The initial deformed characterized, the Charpy impact properties tested room temperature (RT) liquid nitrogen (LNT). It was found that absorbed energy increased temperature, while showed different trends: parabolic increase RT exponential LNT, respectively. Compared fully recrystallized...
The microstructure evolution during cold rolling and mechanical properties after solution treatment of 304 stainless steel with 2 wt% Al are investigated the tensile steels also tested. results show that consists ferrite austenite phases small amounts granular precipitates 4 C 3 AlN, content decreases gradually increase deformation. For deformations 30%, 50%, 70%, average grain sizes samples 10.23, 8.66, 7.13 μm, respectively. After refinement is obvious for <101> orientation a large...
Building Information Modeling (BIM) has gained rapid acceptance in the building industry recent years Hong Kong; both government and practitioners realize this irreversible trend of changing gradually from traditional 2D representation product fragmented contributions stakeholders to 3D model streamlined lifecycle management near future. This research presents an overview on implementation BIM, its current state practice Kong. While primary intention is introduce BIM-related works...