A5029616877- Welding Techniques and Residual Stresses
- Hydrogen embrittlement and corrosion behaviors in metals
- Non-Destructive Testing Techniques
- Microstructure and Mechanical Properties of Steels
- Metal Alloys Wear and Properties
- Additive Manufacturing Materials and Processes
- Concrete and Cement Materials Research
- Advanced ceramic materials synthesis
- Electrophoretic Deposition in Materials Science
Advanced Manufacturing Research Centre
2018-2021
University of Sheffield
2017-2021
University of Manchester
2017-2021
Centre for Materials for Electronics Technology
2007
The double-ellipsoidal heat power density model proposed by Goldak, has been widely used as the basis for modelling transfer in arc welding operations more than thirty years. This approach proved to be extremely effective a wide range of operations. However, application distribution is less appropriate keyhole-laser or electron-beam operations, situations where takes place within deep narrow grooves. In this paper extended double-ellipsoidal-conical order accurately describe transient...
Dilution represents the contribution from base material to weld metal and its important effects are complicated for multi-pass steel welds. In this study, dilution was determined each bead in a 3-pass gas tungsten arc (GTA) corresponding submerged (SA) weld. Different filler materials were used with process, but both cases involved deposition of wires into grooves low-alloy (SA508) ferritic plates. Martensite bainite observed heat-affected zone (HAZ) cases. Acicular ferrite dominated SA...
Welding is an important process used during the construction and maintenance of nuclear reactor components. results in residual stresses, distortions microstructural changes joined components, which can have significant deleterious effects on their in-service performance. It thus crucial for engineers to effectively predict these effects. Ferritic steels undergo solid-state phase transformations (SSPT) heating cooling, making welding simulation challenging. The strains associated with SSPTs...
In this study we aim to determine how the choice of welding process might impact on through-life performance critical nuclear components such as reactor pressure vessel, steam generators and pressuriser in a pressurised water reactor. Attention is devoted technologies that are currently employed fabrication components, i.e. narrow-gap variants gas-tungsten arc (GTAW) submerged (SAW), well technology be applied future (electron beam welding). The residual stresses introduced by operations...
Reduced-pressure electron beam (EB) plate butt welds were manufactured in two low-alloy pressure-vessel steels, SA508 Gr 3 Cl 1 and 2, at thicknesses both 30 mm 130 mm. Transient temperatures during welding recorded using thermocouple arrays. Residual stresses the as-welded condition after post-weld heat treatment measured diverse methods: neutron diffraction contour method thickness; deep hole drilling Incremental centre measurements performed thickness to better understand near-surface...
In this study we aim to determine how the choice of welding process might impact on through-life performance critical nuclear components such as reactor pressure vessel, steam generators and pressuriser in a pressurised water reactor. Attention is devoted technologies that are currently employed fabrication components, i.e. narrow-gap variants gas-tungsten arc (GTAW) submerged (SAW), well technology be applied future (electron beam welding). The residual stresses introduced by operations...
Alumina and zirconia were dispersed individually in aqueous media using Darvan C as the dispersant at optimised pH condition. Based on sedimentation, rheology, yield stress, electrodeposition zeta potential measurements, 2 wt-% of a 10·5 found to be optimum condition for codispersion alumina zirconia. Aqueous tape casting slurries with solid loading 32 prepared under conditions dispersion. Alumina–zirconia (50 : 50) composite tapes 40 μm thickness 56% green density obtained.