A5063969026- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Nuclear Physics and Applications
- Aluminum Alloys Composites Properties
- X-ray Diffraction in Crystallography
- Nuclear Materials and Properties
- Non-Destructive Testing Techniques
- Fatigue and fracture mechanics
- Aluminum Alloy Microstructure Properties
- Microstructure and Mechanical Properties of Steels
- High-pressure geophysics and materials
- Fusion materials and technologies
- Hydrogen embrittlement and corrosion behaviors in metals
- Nuclear reactor physics and engineering
- Metal and Thin Film Mechanics
- Titanium Alloys Microstructure and Properties
- High Temperature Alloys and Creep
- Surface Treatment and Residual Stress
- Ferroelectric and Piezoelectric Materials
- Radioactive element chemistry and processing
- Advanced ceramic materials synthesis
- Advanced materials and composites
- Radiation Detection and Scintillator Technologies
- Additive Manufacturing Materials and Processes
- High-Velocity Impact and Material Behavior
Nelson Mandela University
2013-2024
European Incoherent Scatter Scientific Association
2023-2024
University West
2022
University of Malta
2017-2020
Port Elizabeth Provincial Hospital
2011-2016
The University of Sydney
2016
MAX IV Laboratory
2013-2015
Lund University
2008-2015
Innovation Skåne (Sweden)
2015
European Spallation Source
2010-2012
The determination of residual stress by diffraction depends on the correct measurement strain-free lattice spacing d_{hkl}^0, or alternatively enforcement some assumption about state strain within body. It often represents largest uncertainty in measurements since there are many ways which can vary that unrelated to stress. Since reducing this is critical improving reliability measurements, aspect needs be addressed, but it inadequately considered experimenters. Many different practical...
The positions of Bragg edges in neutron transmission experiments can be defined with high accuracy using the time-of-flight (TOF) technique on pulsed sources. A new dedicated instrument has been developed at ISIS, UK spallation source, which provides a precision Δ d / ≃ 10 −5 determination interplanar distances. This is achieved by fitting theoretical three-parameter expression to normalized appearing TOF spectra. demonstrated performed iron, niobium and nickel powders. applicability for...
The lattice parameters and crystallographic texture in La, Sr-doped soft lead zirconate titanate ceramics were examined using high-energy synchrotron x-ray diffraction. preferred orientations poled tetragonal rhombohedral near the morphotropic phase boundary, caused by ferroelectric domain switching, determined monitoring (002)∕(200) (111)∕(111¯) intensity ratios, respectively. strains also monitored {111} {200} plane spacings ceramics, diffraction experiments carried out transmission,...
Residual stress and distortion continue to be important issues in shipbuilding are still subject large amounts of research. This paper demonstrates how the type welding process influences amount distortion. Many shipyards currently use submerged arc (SAW) as their choice. In this manuscript, authors compare welds made by SAW with DC gas metal welding, pulsed Fronius cold transfer (CMT), autogenous laser hybrid on butt 4 mm thick DH36 ship plate. Laser were found produce lowest Nevertheless,...
The authors investigate the efficacy of applying rolling pressure along weld line in thin butt welds produced using friction stir welding (FSW) as a means controlling residual stresses. Two cases are examined and each case, comparison is made against welded condition. First, for FSW AA 2024 aluminium alloy, roller tensioning was applied during two rollers placed behind either side tool. Very little effect seen down forces (0, 50, 75 kN). Second, 2199 post-weld single directly on FS line. In...
Abstract: Conventional neutron radiography can be strongly enhanced by obtaining Bragg‐edge information spatially correlated with the attenuation coefficient. This now achieved through time‐of‐flight techniques at pulsed sources, utilising a counting detector high‐spatial and high‐temporal resolution. In these measurements, positions of Bragg edges in principle obtained for each 55 × μm 2 pixel radiographic image. The combination both enables high spatial resolution studies to carried out on...
In this paper, the levels of residual stress in vicinity linear friction welds Ti–6Al–4V (Ti-64), a conventional α– β titanium alloy, and Ti–6Al–2Sn–4Zr–2Mo (Ti-6242), near α alloy with higher temperature capability, are mapped contrasted. The alloys have significantly different high properties aim work was to investigate how might affect their propensity accumulate weld stresses response post-weld heat treatment. Measurements reported using energy synchrotron X-ray diffraction results...