A5035955181- Metallic Glasses and Amorphous Alloys
- Aluminum Alloy Microstructure Properties
- Magnetic properties of thin films
- Aluminum Alloys Composites Properties
- Magnetic Properties and Applications
- Magnesium Alloys: Properties and Applications
- Solidification and crystal growth phenomena
- Metallurgy and Material Forming
- Graphene research and applications
- Electromagnetic wave absorption materials
- Carbon Nanotubes in Composites
- Additive Manufacturing Materials and Processes
- Metallurgical Processes and Thermodynamics
- Diamond and Carbon-based Materials Research
- Advanced materials and composites
- High Temperature Alloys and Creep
- Additive Manufacturing and 3D Printing Technologies
- Hydrogen Storage and Materials
- Graphene and Nanomaterials Applications
- nanoparticles nucleation surface interactions
- High-Velocity Impact and Material Behavior
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Electromagnetic Compatibility and Noise Suppression
- Nanopore and Nanochannel Transport Studies
Brunel University of London
2015-2024
University of Warwick
2021-2023
East China Normal University
2001-2021
Engineering and Physical Sciences Research Council
2015-2017
Imperial College London
2004-2015
Casting is the first step toward production of majority metal products whether final processing casting or other thermomechanical processes such as extrusion forging. The high shear melt conditioning provides an easily adopted pathway to producing castings with a more uniform fine-grained microstructure along distribution chemical composition leading fewer defects result reduced shrinkage porosities and presence large oxide films through microstructure. effectiveness in improving used...
The paper focuses on the effect of scanning strategies microstructural evolution, defect formation, and macro-hardness performance laser-powder bed fusion (L-PBF) produced samples low alloy 20MnCr5 steel. Respect to strategies, advanced characterization techniques were employed study (i) as-built microstructure, (ii) inclusion size distribution, (iii) details compositional variation around porosity within build. Microstructural shows that chessboard strategy can provide a favorable...
Abstract Surface oxidation of metallic powders may significantly affect their melting and solidification behavior limit service life in the additive manufacturing (AM) process. In present work, three levels surface oxide concentration were prepared on AM-grade 316L stainless steel powders, was systematically studied through in-situ observation, advanced characterization, phase-field modeling, theoretical analysis. Si, Mn, Cr participated reaction powder with low medium oxygen contents,...
Abstract The oxide evolution during the solidification of 316L stainless steel from additive manufacturing powders with different oxygen contents is studied by in situ observation melting and powder materials, advanced characterization solidified non-equilibrium thermodynamic analysis. An map established for contents. It reveals relationship between surface oxidation reused its expected species morphology as-solidified component. For content higher than ~ 0.039 pct, liquid formed first melt...
Giant magnetoimpedance (GMI) was investigated from room temperature up to 823 K in an Fe-based nanocrystalline Fe73.0Cu1.0Nb2.5V1.0Si13.5B9.0 ribbon. With increment of the measuring (T), GMI shows notable enhancement followed by a declining dependence, yielding maximum value around 603 where relative is nearly four times that at temperature. The field peak vs Hdc curve decreases monotonically with T, but T=603 there superimposes trough-shaped variation. thermal evolution soft magnetic...
A novel melt conditioned twin roll casting (MCTRC) strategy with emphasis on solidification control has been investigated for producing thin gauge Mg alloy sheets ready component forming, the minimal requirement of down-stream processing. The performance 1.5 mm thick AZ31 sheet is reported in this study to demonstrate effect microstructure and mechanical properties produced by MCTRC process. anisotropy in-plane tensile evaluated association characteristic features solidification, deformation...
In this Letter, we found that the growth of graphene on Cu oxide foil is significantly affected by concentration oxygen. The grain size grown a substrate with relatively high oxygen much smaller than lower concentration. By controlling oxidation at proper degree, can obtain millimeter scale single crystals temperature 1050 °C. On basis our experimental observations, dual role in CVD was revealed: (i) Oxygen surface contribute to decomposition hydrocarbon feedstock and decrease barrier,...
The microstructure characteristics in early stage shear localization of near-α Ti−6Al−2Zr−1Mo−1V titanium alloy were investigated by split Hopkinson pressure bar (SHPB) tests using hat-shaped specimens. microstructural evolution and deformation mechanisms specimens revealed electron backscattered diffraction (EBSD) method. It is found that the nucleation expansion adiabatic band (ASB) are affected both geometric structural factors. increase dislocation density, structure fragment temperature...