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Showing 1 to 20 of 69 for “"TN Mining engineering. Metallurgy"”.
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Improving performance of discharge equipment for coals with poor handling characteristics
The accepted design techniques for bulk solids handling equipment are frequently overlooked during the installation of industrial process plants. As a result, flow unreliability is often observed in silos in the form of flow stoppages, product bulk density variations, formation of rat-holes, …
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The crystallisation of Poly (aryl ether etherketone) (PEEK) and its carbon fibre composites
… (PEEK) is a semi-crystalline, high-performance engineering polymer whose properties can be enhanced through fibre reinforcement. The properties of PEEK and its composites are sensitive to changes in the crystalline content and morphology, which are influenced by the processing conditions. As …
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The low temperature fracture behaviour of the super duplex stainless steel Zeron 100
The micromechanisms of fracture in an austenitic/ferritic super-duplex stainless steel (Zeron 100) have been studied for a range of product forms, including cross-rolled plate, conventional (ingot) route and powder route extruded pipe, hot isostatically pressed (HIP'd) powder, and weldments …
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Passive materials for high frequency piezocomposite ultrasonic transducers
High frequency ultrasound is receiving increased attention for medical imaging in areas such as ophthalmology and dermatology. Recent advances in the manufacture of fine scale piezocomposite materials mean there is great potential for commercial transducers far superior to conventional devices …
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The application of positron emission particle tracking to study non-metallic inclusions in metal castings
To improve the efficiency of turbine aero engines, higher operating temperatures and weight savings are being investigated. Alloys such as RR1000 are being trialled as they perform better at higher temperatures than current nickel-based superalloys. To achieve weight savings, inertia welding is …
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Statistical modelling of the transition toughness properties of low alloy pressure vessel steels
The transition toughness of low alloy steels used in pressure vessels is of key importance to establishing the safe operation of a number of structures; of these, the integrity of a nuclear reactor vessel is of greatest concern. The through life toughness of such vessels is a combination of the …
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Fabrication of 316-L stainless steel and composite micro machine components using softlithography and powder metallurgy process
… materials, using Softlithography and powder metallurgy processes. Three different 316-L stainless steel powders, including 5, 10 and 16 μm in size, and two different ceramics powders, including 400 nm alumina and 320 nm titania, were tested. The PhD research process can be divided into three …
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The corrosion of CoCrMo alloys for biomedical applications
CoCrMo alloys have been used for biomedical implants for a number of years. They are now frequently used for the metal-on-metal hip resurfacing joints due to their high corrosion and wear performance. The present project was carried out to investigate the feasibility of taking electrochemical …
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Microstructure property development in friction stir welds of aluminim based alloys
Friction Stir Welding (FSW) is known to result in a complex microstructural development, with features that remain unexplained, such as: the formation of the onion rings structure. Moreover, various microstructural factors have been suggested to control the strength in Al-Mg AA5xxx welds. The …
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Microstructural analysis of aluminium alloy 2096 as a function of heat treatment.
A detailed microstructural investigation into possible metallurgical culprits of stress corrosion cracking (SCC) of Al-Li-Cu alloy AA2096 was carried out as a function of isothermal aging time at 160°C. Two tempers were analysed for this study: under-aged at 4 hours (UA4) and under-aged at 12 hours …
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Development of bimodal grain structures and their effect on toughness in HSLA steel
To understand the formation of bimodal ferrite grain structures (i.e. mixed coarse + fine grain sizes) in TMCR HSLA steel plates, as-continuously cast HSLA steel slabs with varying microalloying additions (Ti, Nb and V) were reheated to temperatures in the range 1000-1300 °C and deformed at 1110 °C …
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The industrial development of transparent conducting coatings by a Sol-Gel route
… the work was performed with a supply chain partnership to facilitate commercial uptake. Sol-gel technology was used to facilitate direct printing of patterned layers. Precursors were selected and a processing route developed. Values for glass transition and crystallization temperature were …
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The effect of post weld heat treatment on the corrosion behaviour of a AA2050T34-FSW
The corrosion behaviour of a AA2050T34-FSW was examined as a function of post weld heat treatment condition. Immersion tests in 0.1 M Nac1 and G110 intergranular tests were performed and the corrsion morphology and the depth of attacks in the different regions of the weld were investigated using …
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Thin film Palladium-Ytrium membranes for hydrogen separation
The permeability of hydrogen in thin film Pd-Y composite membranes has been investigated for the first time. Thin (5 µm) Pd-Y films were deposited onto macroporous 316L stainless steel substrates by magnetron sputtering. Prior to deposition, a novel laser melting technique was employed in an …
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Vibration assisted filling of thin section castings
Understanding of the mechanism of the vibration needed to fill thin section or one with sharp edges in profile shapes and clarifying the dominant control parameters of the vibration in thin wall investment casting is key to producing sound casting (one free of misrun defects). It's also a central …
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Destabilization of lithium borohydride with additions of magnesium hydride
It has been shown that lithium borohydride can be destabilized with magnesium hydride additions for the purpose of reversibly hydrogen. In reactive composites of these hydrides alternative chemical pathways become available for dehydrogenation, which can modify both the thermodynamics and kinetics …
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Structural, electrical and optical properties of transparent conducting Si-doped ZnO thin films grown by pulsed laser deposition
Thin silicon doped zinc oxide films were ablated onto borosilicate glass substrates by pulsed laser deposition of a bulk ZnO target doped with 2 wt% silicon. The rotating target was irradiated at low ambient oxygen pressures by a KrF Excimer laser (Lambda physics LPX 300) emitting pulses of 0.18 ns …
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Carbo-nitride precipitation and its effect on matrix transformations in high strength-high toughness 300M steel
The influences of different austenitisation temperatures on the matrix microstructure and mechanical properties (K1C and hardness) of one cast have been investigated. 300M steel has been austenitised at 925 °C for increasing holding times from 1h to 4h and 1025 °C for 2h holding time. …
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The microstructure and properties of hipped powder Ti alloys
… of net shape HIPping for the production of engineering components and in this context the fact that a new HIPping schedule has been developed during this study, where the fatigue properties of samples containing an as-HIPped surface are excellent, is very significant.
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The effect of bond coat oxidation on the microstructure and endurance of two thermal barrier coating systems
A series of isothermal and cyclic oxidation tests were carried out on two thermal barrier coating systems consisting of a CMSX-4 nickel-based superalloy substrate, NiCoCrAlY overlay bond coat applied by two different techniques and a yttria stabilised zirconia topcoat applied by electron beam …
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