Stress Relief Cracking (SRC) in low alloy steels was the core focus for this work. Stress relief cracking is an ongoing concern for thick-walled creep resistant steel welds during PWHT when high restraint and high residual stresses are present after welding. While much is alread…
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The objective of this work was to investigate the behaviour of malleable metals in tumbling mills. Much of the work focused on lead: shots, flattened shots and fragments were ground in three different laboratory mills. Testwork with fragments was repeated in the presence of a br…
This Dissertation focuses on the topic of the emergence of social complexity during the Chalcolithic by investigating archaeological evidence related to the earliest production and use of copper in the southern Levant. One key question concerns the particular economic, social an…
The evolution of advanced ceramic materials over the past two decades has not been matched by improvements in ceramic joining science and technology, particularly for high temperature applications. Of the techniques being evaluated for joining ceramics, brazing has been found to…
The high cycle fatigue crack initiation and small crack growth processes of a particulate-reinforced aluminum alloy metal matrix composite (MMC) system have been evaluated. The research is based on a model Al-Si-Mg system in which Si particles are dispersed within an age-hardena…
Polypyrrole (PPy) can be synthesized by either chemical or electrochemical methods. Electrochemical methods (electropolymerization) usually give higher PPy conductivity than the chemical methods. However, the electropolymerization of pyrrole on oxidizable metals such as mild ste…
Companies spend a large amount of money in constructing pipeline networks that must be protected against corrosion. It was estimated, in the USA alone, that the cost of corrosion is about 160 billion or 4.2% of the gross national product. Cathodic/Anodic protection strategies ha…
Alloy 800HT is a heat resistance material that is used in high temperature industrial applications such as steam/hydrocarbon reforming and ethylene plant tubes. Long time exposure under these service conditions cause the alloy to undergo microstructural changes. The alloy, in fa…
The purpose of this study was to search for and evaluate the effectiveness of various inhibitors to slow down or prevent atmospheric corrosion/discoloration of the local mild steel during storage in the Arabian Gulf region. Various inhibitors were reported in the literature that…
Polarized light microscopy (PLM) together with scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS) were used to investigate the mining and mineral processing remains from a recently discovered archaeological site in the Taurus Mountains of southeastern Anat…
Economic considerations have forced users of commercial jet transports to retain the services of aircraft that have surpassed the designed lifetime of structural components of the aircraft. With the increased service time that these aircraft are experiencing, many of the aircraf…
While the study of non-composite castellated beams have received much attention, very little work has been done on composite castellated beams. The effect of the composite concrete slab is to significantly increase the flexural resistance of a steel section; it is however uncert…
In today's world, aluminum alloys with improved mechanical properties are in great demand. The properties such as formability, machinability, light weight, and high strength-to-weight ratio enable these alloys to undergo almost all types of principal production processes like ca…
Al-Mg-Si alloys (6xxx series alloys) are very popular in extrusion industry and are generally known as high speed extrusion alloys. Extrusion die solution treatment and press quenching greatly facilities the precipitation hardening process since only the last aging process needs…
Arbitrary Lagrangian Eulerian (ALE) description has been used to simulate large-deformation, metal-forming problems. Certain mesh governing algorithms are implemented in ALE formulations to control mesh convection. A punch problem is simulated and advantages of ALE simulations o…
The astrolabe collection of the Adler Planetarium and History of Astronomy Museum, Chicago, IL, was examined using non-destructive synchrotron based high-energy X-ray techniques including diffraction, fluorescence, and radiography to determine the metallurgy, microstructure, and…
Relatively pure and heavily alloyed ductile iron castings were sectioned into five levels increasing numerically from the bottom of the casting to the riser. Cylinders from each level were austenitized at 927°C and then austempered at 410, 371 or 316°C to produce ausferrite. Ten…
This dissertation assembled and interpreted archaeological, ethnographic, and archaeometallurgical data in an effort to reconstruct and understand the contributions of ironworking technology to the development of Swahili city-states between the tenth and sixteenth centuries A.D.…
This investigation is focused on the evaluation of stress corrosion cracking (SCC), localized corrosion, and hydrogen embrittlement (HE) susceptibility of martensitic Alloy EP-823 in neutral and acidic solutions at ambient and elevated temperatures. While no failures were observ…