Materials Literature
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Fracture Mechanics process of Welded Joint is a very vast research area and has many possibilities for solution and prediction. Although the fatigue strength (FAT) and stress intensity factor (SIF) solutions are reported in several handbooks and recommendations, these values are available only for a small number of sp…
residual stress is the only corrosion-limiting mechanism. The objective of this experimental program is to test carbon steel small scale welded U-bend specimens and large welded plates (12 x 12 x 1 in.) in a caustic solution with upper bound chemistry (12 M hydroxide and 1 M each of nitrate, nitrite, and aluminate) an…
Abstract The compound N,N′-1,4-phenylene-bis(3-oxobutanamide) is an industrial intermediate used in the synthesis of azo pigments. Crystallisation experiments only led to the dihydrate form; drying the dihydrate at 120 °C leads to an anhydrous form, but suitable single crystals of the anhydrous form could not be grown…
Triangle-shaped nanohole, nanodot, and lattice antidot structures in hexagonal boron-nitride (h-BN) monolayer sheets are characterized with density functional theory calculations utilizing the local spin density approximation. We find that such structures may exhibit very large magnetic moments and associated spin spl…
Since 2005, Alcoa Fastening Systems (AFS) and Lockheed Martin have been partnering to identify a Cadmium (Cd) plating replacement for threaded fasteners. Previously reported Phase I, II and III studies resulted in alternative coatings that indicated promise as suitable plating materials. Phase IV and V studies continu…
The 3013 containers are designed in accordance with the DOE-STD-3013-2004 and are qualified to store plutonium (Pu) bearing materials for 50 years. The U.S. Department of Energy (DOE) certified Model 9975 shipping package is used to transport the 3013 containers to the K-Area Material Storage (KAMS) facility at the Sa…
The 4-carboxy-imidazole-5-carboxyl-ate(2-) dianion in the title compound, [Ni(C(5)H(2)N(2)O(4))(C(16)H(36)N(4))]·H(2)O, N,O'-chelates to the Ni(II) atom, which shows an octa-hedral coordination. The macrocycle folds itself around the metal atom and binds to it through four secondary nitrogen atoms; adjacent molecules…
Duplex stainless steel has been widely used in chemical industry, oil and gas industry, power plants, and aerospace industry. Since it contains austenite and ferrite in nearly equal proportions which can suppress grain growth at a high temperature, many duplex stainless steels with fine grained microstructures show su…
Aerosil samples, heat treated and then silylated with various silanes at various temperatures have been characterised by adsorption of ethanol at 293 K. Adsorption isotherms were plotted and the BET specific surface areas were determined. Contact angles were measured by the captive bubble method at the three phase con…
A series of polymeric thin films with BFDT (BFDT = 4,5-bis(foroylsulfanyl)-1,3-dithiole-2-thione) doped in PMMA (polymethylmethacrylate) were fabricated by means of spin-coating on quartz substrate. The third-order nonlinear optical properties of the films were investigated by Z-scan technique at 532 nm wavelength wit…
Keggin type of heteropolyacids as green reusable and efficient catalyst was used in the synthesis of benzoyl hydrazones from reaction of benzoic acid hydrazide and aldehyde and ketone derivatives. The synthesis of N-acetyl and N-benzoyl derivatives has also been performed by the reaction of obtained benzoyl hydrazones…
Aurivillius oxides with composition of Na0,5Bi4,5Ti4O15 (NBT), K0,5Bi4,5Ti4O15 (KBT), Sr4Bi2Nb2Ti3O18 (SBNT), Ba4Bi2Nb2Ti3O18 (BBNT)and Bi5Ti5FeO18 (BTF) have been synthesised using the solid state reaction. The obtained oxides were polycrystalline. All the oxides were white, except that Bi5Ti5FeO18 was brick red in c…
The multi-barrier 3013 container used to package plutonium-bearing materials is robust and thereby highly resistant to identified degradation modes that might cause failure. The only viable degradation mechanisms identified by a panel of technical experts were pressurization within and corrosion of the containers. Eva…
Abstract Efficient control and minimization of emissions from technical processes is of major concern in industrial development and process operation. The technical process in the focus of the present contribution is the nitriding process of metallic specimen. The ammonia content in nitriding process flue gases reache…
Glassy phases which have insulating character exist for a variety of monatomic species. By contrast, until recently, it has been possible to make bulk metallic glasses (BMG) by vitrification only for multicomponent systems. After a relatively brief summary on supercooling of a few molecular liquids, we review some of…
Abstract Using the pseudopotential DFT and the empirical potential methods we calculate the potential acting to the hydrogen molecules in narrow single‐wall carbon nanotubes (SWCNT) (6,0),(7,0) and (3,3). The potential forms a goffered potential surface and can be approximated as $V(z,r,\phi ) \approx V_0 \sin (2\pi z…
The Selective laser sintering (SLS) process offers unique capabilities for production of complex, thin-walled geometries with internal features, integral attachments and flanges. The benefits of SLS have been realized on a variety of Boeing military platforms for a number of years. However, applications on commercial…
Planaria sp. is an organism inhabiting clean freshwater. The presence of Planaria sp. is diminishing at several locations. In order to understand the influence of environmental factors to the population of Planaria sp., field study on density and biomass of Planaria sp. has been carried out in two study locations Buki…
The mission of the 9975 package, originally designed only for transportation of radioactive materials, has been broadened to include storage at the Savannah River Site. Two components of this package, namely the containment vessel O-rings and fiberboard overpack, require continued integrity assessment under the storag…
Abstract Single walled carbon nanotubes can be used as nanoscale reaction chambers for producing smaller nanotubes within the host tube from encapsulated fullerenes by annealing. The diameter of the host outer tube restricts the diameter of the inner tube due to van der Waals interactions, but not chirality; however,…