Modelling the shape and thermal dynamics of Ni superalloy rings during spray forming. Part 2 : Thermal modelling - Heat flow and solidification

Mi, J.; Grant, P. S.

doi:10.1016/j.actamat.2007.12.022

Combining geometric morphometrics and functional simulation: an emerging toolkit for virtual functional analyses (2010)
Journal Article
O'Higgins, P., Cobb, S. N., Fitton, L. C., Gröning, F., Phillips, R., Liu, J., & Fagan, M. J. (2011). Combining geometric morphometrics and functional simulation: an emerging toolkit for virtual functional analyses. Journal of anatomy, 218(1), 3-15. https://doi.org/10.1111/j.1469-7580.2010.01301.x

The development of virtual methods for anatomical reconstruction and functional simulation of skeletal structures offers great promise in evolutionary and ontogenetic investigations of form-function relationships. Key developments reviewed here inclu... Read More about Combining geometric morphometrics and functional simulation: an emerging toolkit for virtual functional analyses.

Spray forming of bulk ultrafine-grained Al-Fe-Cr-Ti (2010)
Journal Article
Banjongprasert, C., Hogg, S. C., Liotti, E., Kirk, C. A., Thompson, S. P., Mi, J., & Grant, P. S. (2010). Spray forming of bulk ultrafine-grained Al-Fe-Cr-Ti. Metallurgical and materials transactions. A, Physical metallurgy and materials science, 41(12), 3208-3215. https://doi.org/10.1007/s11661-010-0386-0

An Al-2.7Fe-1.9Cr-1.8Ti alloy has been spray formed in bulk and the microstructure and properties compared with those of similar alloys produced by casting, powder aomization (PA), and mechanical alloying (MA) routes. In PA and MA routes, a nanoscale... Read More about Spray forming of bulk ultrafine-grained Al-Fe-Cr-Ti.

Preliminary trials of in situ ammonia stripping from source segregated domestic food waste digestate using biogas: Effect of temperature and flow rate (2010)
Journal Article
De la Rubia, M. Á., Walker, M., Heaven, S., Banks, C. J., & Borja, R. (2010). Preliminary trials of in situ ammonia stripping from source segregated domestic food waste digestate using biogas: Effect of temperature and flow rate. Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies, 101(24), 9486-9492. https://doi.org/10.1016/j.biortech.2010.07.096

Batch experiments to remove ammonia from food waste digestate were set up, and preliminary runs undertaken. These experiments were based on gas stripping in a heated column reactor; the effects of different temperatures (35, 55 and 70 °C) and gas flo... Read More about Preliminary trials of in situ ammonia stripping from source segregated domestic food waste digestate using biogas: Effect of temperature and flow rate.

Validation of a morphometric reconstruction technique applied to a juvenile pelvis (2010)
Journal Article
Watson, P., O'Higgins, P., Fagan, M. J., & Dobson, C. A. (2011). Validation of a morphometric reconstruction technique applied to a juvenile pelvis. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 225(1), 48-57. https://doi.org/10.1243/09544119jeim810

Three-dimensional reconstructions of bone geometry from microCT (computed tomography) data are frequently used in biomechanical and finite element analyses. Digitization of bone models is usually a simple process for specimens with a complete geometr... Read More about Validation of a morphometric reconstruction technique applied to a juvenile pelvis.

Microstructure and property development in spray formed and extruded Al-Mg-Li-Zr alloys for aerospace and autosport applications (2010)
Journal Article
Hogg, S. C., Mi, J., Nilsen, K. E., Liotti, E., & Grant, P. S. (2010). Microstructure and property development in spray formed and extruded Al-Mg-Li-Zr alloys for aerospace and autosport applications. Materials Science and Engineering Technology / Materialwissenschaft und Werkstofftechnik, 41(7), 562-567. https://doi.org/10.1002/mawe.201000643

Low density Al-4Mg-1.3Li-0.4Zr and Al-6Mg-1.6Li-0.4Zr alloys were spray formed and the billets extruded under a range of conditions. The alloy compositions were selected to provide an attractive balance of tensile strength and elongation, without rel... Read More about Microstructure and property development in spray formed and extruded Al-Mg-Li-Zr alloys for aerospace and autosport applications.

Refinement of TiB2 in Al-Ti-B grain refiner alloys by ultrasound and the effect on Al grain size (2010)
Journal Article
Shu, D., Sun, B. D., Mi, J. W., & Grant, P. S. (2010). Refinement of TiB2 in Al-Ti-B grain refiner alloys by ultrasound and the effect on Al grain size. Materials Science Forum, 654-656, 958-961. https://doi.org/10.4028/www.scientific.net/msf.654-656.958

High-intensity ultrasound was applied during the preparation of an Al-5Ti-1B master alloy when reacting fluoride salts with molten Al. The reaction rate was significantly increased with TiB2 particles of much reduced mean diameter and narrow width sp... Read More about Refinement of TiB2 in Al-Ti-B grain refiner alloys by ultrasound and the effect on Al grain size.

Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys (2010)
Journal Article
Zhang, Y., Guo, Z., Zhang, G., Mi, J. W., & Grant, P. S. (2010). Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys. Materials Science Forum, 654-656, 1363-1366. https://doi.org/10.4028/www.scientific.net/msf.654-656.1363

This paper presents a combined experimental and modelling approach to understand dendrite fragmentation of atomised metal alloy droplets during deposition in spray forming, and to study quantitatively the relationship between this dendrite fragmentat... Read More about Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys.

Phase field modelling of dendrite fragmentation during thermal shock (2010)
Journal Article
Guo, Z., Mi, J. W., & Grant, P. S. (2010). Phase field modelling of dendrite fragmentation during thermal shock. Materials Science Forum, 654-656, 1524-1527. https://doi.org/10.4028/www.scientific.net/msf.654-656.1524

The dendrite grain growth of a succinonitrile based transparent alloy, their fragmentation under an intense thermal shock and the subsequnet morphology evolution during solidification have been simulated using a two-dimensional binary alloy phase fie... Read More about Phase field modelling of dendrite fragmentation during thermal shock.

Modeling the deposition dynamics of a twin-atomizer spray forming system (2010)
Journal Article
Zhang, G., Li, Z., Zhang, Y., Mi, J., & Grant, P. S. (2010). Modeling the deposition dynamics of a twin-atomizer spray forming system. Metallurgical and Materials Transactions B, 41(2), 303-307. https://doi.org/10.1007/s11663-009-9333-0

A numerical study of the deposition dynamics of twin-atomizer spray-forming of large-diameter billets is presented with a focus on the coupled effect of the twinatomizer scan frequency and substrate rotation frequency. The common period of the two fr... Read More about Modeling the deposition dynamics of a twin-atomizer spray forming system.

Statistics of surface gravity wave turbulence in the space and time domains (2009)
Journal Article
Nazarenko, S., Lukaschuk, S., McLelland, S., & Denissenko, P. (2010). Statistics of surface gravity wave turbulence in the space and time domains. Journal of Fluid Mechanics, 642, 395-420. https://doi.org/10.1017/S0022112009991820

We present experimental results on simultaneous spacetime measurements for the gravity wave turbulence in a large laboratory flume. We compare these results with predictions of the weak turbulence theory (WTT) based on random waves, as well as with p... Read More about Statistics of surface gravity wave turbulence in the space and time domains.

Use of a Hydraulic Flush Reactor in a Two-Stage Anaerobic Digestion Process for Biodegradable Municipal Waste (2009)
Journal Article
Walker, M., Banks, C. J., & Heaven, S. (2009). Use of a Hydraulic Flush Reactor in a Two-Stage Anaerobic Digestion Process for Biodegradable Municipal Waste. Environmental Engineering Science, 26(11), 1599-1606. https://doi.org/10.1089/ees.2009.0021

Performance of a hydrolysis reactor in which the solids and liquid retention times were uncoupled to give enhanced solids retention and removal of hydrolysis products was evaluated for a feedstock of biodegradable municipal waste (BMW). The reactor w... Read More about Use of a Hydraulic Flush Reactor in a Two-Stage Anaerobic Digestion Process for Biodegradable Municipal Waste.

Potential errors in the quantitative evaluation of biogas production in anaerobic digestion processes (2009)
Journal Article
Walker, M., Zhang, Y., Heaven, S., & Banks, C. (2009). Potential errors in the quantitative evaluation of biogas production in anaerobic digestion processes. Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies, 100(24), 6339-6346. https://doi.org/10.1016/j.biortech.2009.07.018

Errors that are commonly made in the quantification of biogas from anaerobic digestion experiments were investigated. For liquid displacement gasometers where a barrier solution separates the biogas and the atmosphere, inaccuracy due to gas diffus... Read More about Potential errors in the quantitative evaluation of biogas production in anaerobic digestion processes.

Gravity wave turbulence in wave tanks: Space and time statistics (2009)
Journal Article
Lukaschuk, S., Nazarenko, S., McLelland, S., & Denissenko, P. (2009). Gravity wave turbulence in wave tanks: Space and time statistics. Physical review letters, 103(4), Article ARTN 044501. https://doi.org/10.1103/PhysRevLett.103.044501

We present the first simultaneous space-time measurements for gravity wave turbulence in a large laboratory flume. We found that the slopes of k and ω wave spectra depend on wave intensity. This cannot be explained by any existing theory considering... Read More about Gravity wave turbulence in wave tanks: Space and time statistics.

Two-stage anaerobic digestion of biodegradable municipal solid waste using a rotating drum mesh filter bioreactor and anaerobic filter (2009)
Journal Article
Walker, M., Banks, C., & Heaven, S. (2009). Two-stage anaerobic digestion of biodegradable municipal solid waste using a rotating drum mesh filter bioreactor and anaerobic filter. Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies, 100(18), 4121-4126. https://doi.org/10.1016/j.biortech.2009.03.066

A rotating drum mesh filter bioreactor (RDMFBR) with a 100 μm mesh coupled to an anaerobic filter was used for the anaerobic digestion of biodegradable municipal solid waste (BMW). Duplicate systems were operated for 72 days at an organic loading rat... Read More about Two-stage anaerobic digestion of biodegradable municipal solid waste using a rotating drum mesh filter bioreactor and anaerobic filter.

Validating a voxel-based finite element model of a human mandible using digital speckle pattern interferometry (2009)
Journal Article
Gröning, F., Liu, J.-S., Fagan, M. J., & O'Higgins, P. (2009). Validating a voxel-based finite element model of a human mandible using digital speckle pattern interferometry. Journal of biomechanics, 42(9), 1224-1229. https://doi.org/10.1016/j.jbiomech.2009.03.025

Finite element analysis is a powerful tool for predicting the mechanical behaviour of complex biological structures like bones, but to be confident in the results of an analysis, the model should be validated against experimental data. In such valida... Read More about Validating a voxel-based finite element model of a human mandible using digital speckle pattern interferometry.

The flexural stiffness characteristics of viscoelastically prestressed polymeric matrix composites (2009)
Journal Article
Pang, J. W. C., & Fancey, K. S. (2009). The flexural stiffness characteristics of viscoelastically prestressed polymeric matrix composites. Composites Part A: Applied Science and Manufacturing, 40(6-7), 784-790. https://doi.org/10.1016/j.compositesa.2009.03.009

A novel composite material is described, where tension, applied to polymeric fibres, is released prior to moulding them into a matrix. On matrix solidification, compressive stresses imparted by the viscoelastically strained fibres improve mechanical... Read More about The flexural stiffness characteristics of viscoelastically prestressed polymeric matrix composites.

Development of a coarse membrane bioreactor for two-stage anaerobic digestion of biodegradable municipal solid waste (2009)
Journal Article
Walker, M., Banks, C. J., & Heaven, S. (2009). Development of a coarse membrane bioreactor for two-stage anaerobic digestion of biodegradable municipal solid waste. Water science and technology : a journal of the International Association on Water Pollution Research, 59(4), 729-735. https://doi.org/10.2166/wst.2009.012

A laboratory-scale coarse membrane bioreactor was developed to test its potential for the enhanced degradation of biodegradable municipal (solid) waste. The purpose of the mesh was to retain solid substrate and biomass in the reactor, promoting optim... Read More about Development of a coarse membrane bioreactor for two-stage anaerobic digestion of biodegradable municipal solid waste.

Masticatory loading and bone adaptation in the supraorbital torus of developing macaques (2008)
Journal Article
Kupczik, K., Dobson, C. A., Crompton, R. H., Phillips, R., Oxnard, C. E., Fagan, M. J., & O'Higgins, P. (2009). Masticatory loading and bone adaptation in the supraorbital torus of developing macaques. American journal of physical anthropology, 139(2), 193-203. https://doi.org/10.1002/ajpa.20972

Research on the evolution and adaptive significance of primate craniofacial morphologies has focused on adult, fully developed individuals. Here, we investigate the possible relationship between the local stress environment arising from masticatory l... Read More about Masticatory loading and bone adaptation in the supraorbital torus of developing macaques.

Laboratory studies of near-grazing impulsive sound propagating over rough water (2008)
Journal Article
Qin, Q., Lukaschuk, S., & Attenborough, K. (2008). Laboratory studies of near-grazing impulsive sound propagating over rough water. The Journal of the Acoustical Society of America, 124(2), EL40-EL44. https://doi.org/10.1121/1.2947627

Acoustic impulses due to an electrical spark source (main acoustic energy near 15 kHz) have been measured after propagating near to the water surface in a shallow container resting on a vibrating platform. Control of the platform vibration enabled co... Read More about Laboratory studies of near-grazing impulsive sound propagating over rough water.

Modelling the shape and thermal dynamics of Ni superalloy rings during spray forming. Part 2 : Thermal modelling - Heat flow and solidification (2008)
Journal Article
Mi, J., & Grant, P. S. (2008). Modelling the shape and thermal dynamics of Ni superalloy rings during spray forming. Part 2 : Thermal modelling - Heat flow and solidification. Acta Materialia, 56(7), 1597-1608. https://doi.org/10.1016/j.actamat.2007.12.022

In Part 1 of this paper, a model was described to simulate the dynamic shape evolution of Ni superalloy rings during spray forming, concentrating on the effects of droplet splashing and redeposition. In this part, a companion model is presented that... Read More about Modelling the shape and thermal dynamics of Ni superalloy rings during spray forming. Part 2 : Thermal modelling - Heat flow and solidification.

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