Professor Stephen GR Brown

Professor Stephen GR Brown

Stephen GR Brown

 

Deputy Head of College of Engineering and Director of Research

Overview

Specialist Subjects: Computational Materials Science

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Research

As deputy director of the pan-Wales ASTUTE project, my main focus is modelling work for numerous materials problems covering a variety of time and length scales. This work has enjoyed close collaboration with UK and European manufacturers.

Some recent and ongoing projects include:

  • Nano scale modelling of ageing of steels using Kinetic Monte Carlo Method (Tata Steel Company)
  • Nano scale modelling of the leaching of Raney-Ni catalytic powders using Kinetic Monte Carlo Method (European Space Agency, CERAM, Johnson-Matthey, Leiden University Holland among others)
  • Micro scale Computational Fluid Dynamics modelling for numerical determination of permeability during dendritic solidification of alloys
  • Micro scale electro chemical modelling of localized corrosion (Tata Steel Company)
  • Micro scale diffusion modelling for Ti alloys (Rolls-Royce plc)
  • Macro scale FD/FE simulation of moisture ingress into CFRP aerospace materials (Airbus UK)
  • Macro scale FE radiative heat transfer modelling (DSTL Farnborough)
  • Macro scale electro-thermo-mechanical modelling of hot-forming, hot-rolling, coiling & several resistance welding processes (Tata Steel Company)
  • Macro scale heat transfer and solidification modelling of casting processes (several Welsh-SMEs via ASTUTE project)
  • Discrete Element Modelling of Granular Flow for Blast Furnace and Granular Material Transport (Tata Steel Company)

Full scale Discrete Element Method (DEM) model of a large scale Ball Mill.

Ballmill

Full scale Discrete Element Method (DEM) model of Nickel pellet production process.

Vale

Full scale Discrete Element Method (DEM) model of the charging of a blast furnace.

BF Tiny

New project work has now begun involving Lattice-Boltzmann Modelling of Additive Layer Manufacturing (new EU-FP7 Research Project with European Space Agency).

Selected publications

  • S. Jothi, N. Winzer, T.N. Croft, S.G.R. Brown, Meso-microstructural computational simulation of the hydrogen permeation test to calculate intergranular, grain boundary and effective diffusivities, Journal of Alloys and Compounds, 2015, [ISSN:09258388], [DOI: 10.1016/j.jallcom.2014.12.247]
  • S. Jothi, T.N. Croft, S.G.R. Brown, Coupled macroscale-microscale model for hydrogen embrittlement in polycrystalline materials, International Journal of Hydrogen Energy, 2015, 40, 6, [ISSN:03603199], [DOI: 10.1016/j.ijhydene.2014.12.068]
  • J. A. Cherry, H. M. Davies, S. Mehmood, N. P. Lavery, S. G. R. Brown, J. Sienz, Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting, The International Journal of Advanced Manufacturing Technology, 2015, 76, 5-8, [ISSN:0268-3768], [DOI: 10.1007/S00170-014-6297-2]
  • Sathiskumar Jothi, T.N. Croft, S.G.R. Brown, Modelling the Influence of Microstructural Morphology and Triple Junctions on Hydrogen Transport in Nanopolycrystalline Nickel, Composites Part B: Engineering, 2015, [ISSN:13598368], [DOI: 10.1016/j.compositesb.2014.09.042]
  • Sathiskumar Jothi, T.N. Croft, S.G.R. Brown, Influence of grain boundary misorientation on hydrogen embrittlement in bi-crystal nickel, International Journal of Hydrogen Energy, 2014, 39, 35, [ISSN:03603199], [DOI: 10.1016/j.ijhydene.2014.07.020]
  • S. Jothi, T.N. Croft, S.G.R. Brown, E.A. de Souza Neto, Finite element microstructural homogenization techniques and intergranular, intragranular microstructural effects on effective diffusion coefficient of heterogeneous polycrystalline composite media, Composite Structures, 2014, 108, [ISSN:02638223], [DOI: 10.1016/j.compstruct.2013.09.026]
  • J. Eckermann, S. Mehmood, H.M. Davies, N.P. Lavery, S.G.R. Brown, J. Sienz, A. Jones, P. Sommerfeld, Computational modeling of creep-based fatigue as a means of selecting lead-free solder alloys, Microelectronics Reliability, 2014, 54, 6-7, [ISSN:00262714], [DOI: 10.1016/j.microrel.2014.02.017]
  • S. Jothi, T.N. Croft, S.G.R. Brown, Multiscale multiphysics model for hydrogen embrittlement in polycrystalline nickel, Journal of Alloys and Compounds, 2014, [ISSN:09258388], [DOI: 10.1016/j.jallcom.2014.12.073]
  • Stephen Brown, Marc A.J. Holmes, DEM Prediction Of Burden Distribution Patterns In A Blast Furnace Bell-Less Top Charging System, Conference: 6th International Conference on Discrete Element Methods (DEM6), 2013
  • Nicholas P Lavery, David J Jarvis, Stephen G. R Brown, Nicholas J Adkins, Benjamin P Wilson, Life cycle assessment of sponge nickel produced by gas atomisation for use in industrial hydrogenation catalysis applications, The International Journal of Life Cycle Assessment, 2013, 18, 2, [ISSN:1614-7502], [DOI: 10.1007/s11367-012-0478-8]
  • Benjamin P Wilson, Nicholas P Lavery, David J Jarvis, Tomi Anttila, Jyri Rantanen, Stephen G.R Brown, Nicholas J Adkins, Life cycle assessment of gas atomised sponge nickel for use in alkaline hydrogen fuel cell applications, Journal of Power Sources, 2013, 243, pp.242, [ISSN:03787753], [DOI: 10.1016/j.jpowsour.2013.05.186]
  • J. Eckermann, S. Mehmood, H. M. Davies, N. P. Lavery, S. G. R. Brown, J. Sienz, A. Jones, P. Sommerfeld, Computational modelling of creep-based fatigue as a means of selecting lead-free solder alloys, 2013, [DOI: 10.1109/EuroSimE.2013.6529901]
  • A J P Gater, G Fourlaris, S G R Brown, L J Baker, Strain aging of titanium-vanadium ultralow carbon strip steels, Ironmaking & Steelmaking, 2012, 39, 3, pp.216, [ISSN:0301923317432812], [DOI: 10.1179/1743281211y.0000000060]
  • N.C Barnard, S.G.R Brown, F Devred, J.W Bakker, B.E Nieuwenhuys, N.J Adkins, A quantitative investigation of the structure of Raney-Ni catalyst material using both computer simulation and experimental measurements, Journal of Catalysis, 2011, 281, 2, pp.300-308, [ISSN:00219517], [DOI: 10.1016/j.jcat.2011.05.010]
  • C. C. N. Bestley, S. G. R. Brown, S. M. Alston, Experimental validation of a thermal model of adhesively bonded scarf repairs for CFRP composite materials incorporating cure kinetics, 2011, 1, pp.351-361, [ISBN:9781845645380], [ISSN:1746-4471], [DOI: 10.2495/MC110311]
  • S. G. R. Brown, N. C. Barnard, Field-based prediction of localized anodic dissolution events taking place on ZnAl alloy coatings in the presence of 5% NaCl solution, 2009, 1, pp.97-108, [ISBN:9781845641924], [ISSN:1746-4471], [DOI: 10.2495/ECOR090101]
  • N. C. Barnard, S. G. R. Brown, F. Devred, B. E. Nieuwenhuys, J. W. Bakker, Atomistic simulation of the nano-structural evolution of Raney-type catalysts from spray-atomized NiAl precursor alloys during leaching with NaOH solution, 2009, 1, pp.151-160, [ISBN:9781845641924], [ISSN:1746-4471], [DOI: 10.2495/ECOR090151]
  • N.C Barnard, S.G.R Brown, Modelling the relationship between microstructure of Galfan-type coated steel and cut-edge corrosion resistance incorporating diffusion of multiple species, Corrosion Science, 2008, 50, 10, pp.2846-2857, [ISSN:0010938X], [DOI: 10.1016/j.corsci.2008.07.005]
  • S.G.R Brown, N.C Barnard, 3D computer simulation of the influence of microstructure on the cut edge corrosion behaviour of a zinc aluminium alloy galvanized steel, Corrosion Science, 2006, 48, 8, pp.2291-2303, [ISBN:0010-938X], [ISSN:0010938X], [DOI: 10.1016/j.corsci.2005.08.015]
  • A GATER, S BROWN, An Analysis of Kinetic Monte Carlo Simulation as a tool for Modelling Strain Ageing, 2005, pp.625-630, [ISBN:1359-6462], [DOI: 10.1016/j.scriptamat.2005.05.035]
  • J. A. Spittle, S. G. R. Brown, Numerical modelling of permeability variation with composition in aluminium alloy systems and its relationship to hot tearing susceptibility, Materials Science and Technology, 2005, 21, 9, [ISSN:0267-0836], [DOI: 10.1179/174328405X51839]
  • S.G.R Brown, J.A Spittle, D.J Jarvis, R Walden-Bevan, Numerical determination of liquid flow permeabilities for equiaxed dendritic structures, Acta Materialia, 2002, 50, 6, pp.1559-1569, [ISBN:1359-6454], [ISSN:13596454], [DOI: 10.1016/S1359-6454(02)00014-9]
  • J D James, J A Spittle, S G R Brown, R W Evans, A review of measurement techniques for the thermal expansion coefficient of metals and alloys at elevated temperatures, 2001, pp.R1-R15, [ISBN:0957-0233], [DOI: 10.1088/0957-0233/12/3/201]
  • K. Ravindran, S.G.R. Brown, J.A. Spittle, Prediction of the effective thermal conductivity of three-dimensional dendritic regions by the finite element method, Materials Science and Engineering: A, 1999, 269, 1-2, [ISSN:09215093], [DOI: 10.1016/S0921-5093(99)00160-4]
  • S G R Brown, J D James, J A Spittle, A 3D numerical model of the temperature - time characteristics of specimens tested on a Gleeble thermomechanical simulator, Modelling and Simulation in Materials Science and Engineering, 1997, 5, 6, [ISSN:0965-0393], [DOI: 10.1088/0965-0393/5/6/001]

Teaching

  • EG-292 - Modelling and Simulation of Materials (14/15)
  • EG-380 - Computational Materials 2 (14/15)

Research theses supervised

PhD

  • 2015 - Scandium Metal Processing for Space Applications (2nd Supervisor: Dr Nicholas Lavery)
  • 2015 - Design and Build of Components for a Ventricular Assist Device by Selective Laser Melting (1st Supervisor: Dr Nicholas Lavery)
  • 2014 - DFT Study of solids for electronics and material science (1st Supervisor: Dr Antonio Martinez Muniz)
  • 2014 - High throughput methodologies and materials characterisation and materials characterisation for the optimisation and discovery of new alloys. (1st Supervisor: Dr Nicholas Lavery)
  • 2012 - 'Multiscale modelling and experimentation of hydrogen embrittlement in aerospace materials' (1st Supervisor: Dr Thomas Croft)
  • 2010 - 'Experimentation and Simulation for Additive Layer Manufacturing and Design' (1st Supervisor: Professor Johann Sienz)
  • 2010 - 'On-cooling property and microstructure studies' (1st Supervisor: Dr Karen Perkins)
  • 2010 - 'Impact of corrosion features on the remnant fatigue life of a nickel alloy for disc rotor applications' (1st Supervisor: Dr Karen Perkins)
  • 2009 - 'Characterisation and Evolution of the Grain Boundary Network in BCC Metals' (1st Supervisor: Professor Valerie Randle)
  • 2009 - 'Joining, Repair and Strructural Integrity of IN718 Aerospace Material' (1st Supervisor: Dr Karen Perkins)
  • 2009 - 'On the effects of special boundary geometries on intergranular corrosion and grain boundary evolution in aluminium' (1st Supervisor: Professor Valerie Randle)
  • 2009 - 'Modelling of Water Absorption into Carbon Fibre/Epoxy Composites' (1st Supervisor: Dr John Arnold)
  • 2006 - Relating moisture ingress to component strength for carbon-fibre composites (2nd Supervisor: Dr John Arnold)
  • 2006 - Finite element approach for relating moisture ingress to strength in composite materials (2nd Supervisor: Professor Martin Bache)
  • 2005 - A New Design Methodology for composite materials exposed to humid, high temperature environments (2nd Supervisor: Professor Martin Bache)
  • 2004 - Hydrodynamics of surfboard fins (2nd Supervisor: Professor Georgios Fourlaris)
  • 2002 - Finite Element Modelling and Experimental Validation in Radiative Heat Transfer (2nd Supervisor: Dr Nicholas Lavery)
  • 2002 - Microstructure-mechanical Property relationships in novel High Strength Low Alloy Strip Steels (1st Supervisor: Professor Georgios Fourlaris)
  • 2002 - Development of Novel IF strip steel grades (1st Supervisor: Professor Georgios Fourlaris)

EngD

  • 2013 - Development of multi-scale and multi-physical models of the ALM process (1st Supervisor: Dr Nicholas Lavery)
  • 2012 - Computational Modelling and Verification of the ALM Melt Pool (2nd Supervisor: Professor Johann Sienz)
  • 2011 - 'Lifing Methods Against Rotor Overspeed Failure for Gas Turbine Applications' (1st Supervisor: Dr Mark Whittaker)
  • 2011 - A multi-physic approach to the improvement and optimisation of manufacturing processes involving the mixing/interaction of fluids, by utilising Computational Fluid Dynamics (CFD) (1st Supervisor: Professor Oubay Hassan)
  • 2011 - 'Wear fatigue in nickel superalloys' (1st Supervisor: Dr Mark Whittaker)
  • 2010 - Effective computer simulations of hot-forming process for boron steels to support steel development, process understanding and automotive applications deployment (2nd Supervisor: Professor Georgios Fourlaris)
  • 2010 - A numerical simulation of particulate distribution of the blast furnace raw material burden through the Paul Worth Bell-less Top apparatus (2nd Supervisor: Professor Georgios Fourlaris)
  • 2010 - Effect of SOx and chlorine on crack growth behaviour of a nickel alloy for disc applications (1st Supervisor: Dr Karen Perkins)
  • 2010 - 'Thermo-mechanical fatigue crack growth of a polycrystalline nickel aklloy' (1st Supervisor: Dr Mark Whittaker)
  • 2010 - Novel testing techniques to characterise advanced structural materials (1st Supervisor: Professor Martin Bache)
  • 2010 - 'The mechanical characterisation of a high strength, creep resistant steel for aerospace applications' (1st Supervisor: Dr Karen Perkins)
  • 2010 - Improved creep models for nickel based disc alloys (1st Supervisor: Dr Mark Whittaker)
  • 2010 - 'The contributions of oxidation, mean stress and surface condition on the fatigue response of RR1000' (1st Supervisor: Professor Martin Bache)
  • 2010 - Small scale characterisation of novel aero-engine alloys (1st Supervisor: Professor Martin Bache)
  • 2010 - 'New generation advanced high strength steels for automotive hot stamping technologies' (1st Supervisor: Professor Georgios Fourlaris)
  • 2009 - '''In-service application of composite repair solution''' (2nd Supervisor: Dr John Arnold)
  • 2009 - 'The effect of hot mill through-process temperatures variability on whole coil property variability of AHSS' (2nd Supervisor: Professor David Worsley)
  • 2009 - 'The analysis of bonded repair solutions for primary composite aircraft structures' (1st Supervisor: Professor Johann Sienz)
  • 2007 - Investigation on the metallurgical principles of solid state welding of tinplate. (2nd Supervisor: Professor Georgios Fourlaris)
  • 2007 - 'Hot Rolled Multiphase Steels' (1st Supervisor: Professor Georgios Fourlaris)
  • 2005 - Modelling of blast furnace operations. (2nd Supervisor: Dr Mark Evans)
  • 2005 - Simulation of industrial granular flow and its effect on the sintering process (2nd Supervisor: Dr Mark Evans)
  • 2004 - Modelling of the resistance spot welding process of sheet steel products (2nd Supervisor: Professor Georgios Fourlaris)
  • 2004 - Electro-thermo-mechanical finite modelling of the high speed resistance seam welding process (2nd Supervisor: Professor Georgios Fourlaris)
  • 2004 - Influence of prior particle boundary structure and deformation on the microstructure and mechanical properties of a powder metallurgy nickel alloy for aero-engine disc applications. (1st Supervisor: Professor Martin Bache)
  • 2003 - Modelling of the Bake Hardening Sequences in Novel Interstitial Free Bake Hardening Steels For Automotive Applications (1st Supervisor: Professor Georgios Fourlaris)
  • 2001 - Computer Modelling of Microstructure in Hot Dip Zinc Alloy Coatings (2nd Supervisor: Professor Hamilton Mcmurray)
  • 2001 - Thermal Modelling of High Speed Resistance Welding (2nd Supervisor: Professor David Worsley)
  • 2001 - Mathematical modelling of heat transfer during the hot rolling of steel strip (2nd Supervisor: Professor Brian Wilshire)
  • 2000 - The relationship between metallurgical properties and the crash performance of automotive structures (1st Supervisor: Professor Georgios Fourlaris)

MPhil

  • 2009 - 'Modelling of Water Absorption into Carbon Fibre/Epoxy Composites' (1st Supervisor: Dr John Arnold)

MRes

  • 2014 - Steel Technology (1st Supervisor: Professor Georgios Fourlaris)
  • 2012 - 'The utilisation of infrared technology to measure temperature of cobalt and nickel based alloys' (2nd Supervisor: Dr Amitabha Das)
  • 2011 - 'Understanding Yield Discrepancies between Slab and Hot Rolled Coil' (1st Supervisor: Professor Georgios Fourlaris)
  • 2011 - Melt removal developments for improved blast furnace operations (1st Supervisor: Professor Georgios Fourlaris)
  • 2011 - Steel Technology (1st Supervisor: Professor Georgios Fourlaris)
  • 2011 - Steel Technology (1st Supervisor: Professor Georgios Fourlaris)
  • 2011 - Develop a technical standard for aging characteristics of bake hardenable galvanised steel (1st Supervisor: Professor Georgios Fourlaris)
  • 2010 - 'Evaluation of rolling capability for various electrical steel grades at Port Talbot hot mill for the use in the power industry' (1st Supervisor: Professor Georgios Fourlaris)
  • 2010 - 'Acceptance and commissioning of an automated optical emission spectrometer for process control at an integrated steelworks' (1st Supervisor: Professor Georgios Fourlaris)
  • 2010 - Refractories and their application used in Steel making (1st Supervisor: Professor Georgios Fourlaris)
  • 2010 - 'Effect of roller levelling on tinplate and chrome plated strip shape' (1st Supervisor: Professor Georgios Fourlaris)
  • 2009 - '''In-service application of composite repair solution''' (2nd Supervisor: Dr John Arnold)
  • 2009 - 'The analysis of bonded repair solutions for primary composite aircraft structures' (1st Supervisor: Professor Johann Sienz)
  • 2009 - The Effects of Mixed Liquids on the Stiffness of Carbon Fibre Reinforced Composites (1st Supervisor: Dr John Arnold)
  • 2009 - 'Non-Metallic Inclusions : Development of a Fast Characterisation Technique at Port Talbot Works' (1st Supervisor: Professor Georgios Fourlaris)
  • 2009 - 'Process Optimisation for Galvaised Structural Products' (1st Supervisor: Professor Georgios Fourlaris)
  • 2009 - 'Hot Rolling a New Steel Grade for DWI Tinplate Applications' (1st Supervisor: Professor Georgios Fourlaris)
  • 2009 - '''Failure reduction and increased reliability in continuous casting within Port Talbot Steel Works, the true cost of poor lubrication practices''' (1st Supervisor: Professor Georgios Fourlaris)
  • 2009 - 'Combustion of Granulated Coal in Blast Furnace' (1st Supervisor: Professor Georgios Fourlaris)
  • 2009 - 'Positive release of hot-dip galvanised automotive material to prevent coating adhesion failure at customer' (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - Determination of diffusion coefficients for water in CFRP in different orientations (2nd Supervisor: Dr John Arnold)
  • 2008 - The effect of absorbed moisture on the bearing strength of carbon fibre composites (2nd Supervisor: Dr John Arnold)
  • 2008 - Characterisation of a new through-thickness tensile test for CFRP (1st Supervisor: Dr John Arnold)
  • 2008 - Design and Optimization of Joints in a Carbon Fibre Bicycle Frame (1st Supervisor: Professor Johann Sienz)
  • 2008 - - Carbonaceous Material Selection - refractory lining integrity/performance/concept - Heat transfer/temperature profile across the hearth - FEM Modelling - Stress/Strain behaviour analysis generated in the refractory lining- effects on furnace shell / tuyere holder etc - Analysis of thermal expansion requirements against design allowances - Interface between Refractory design and cooling system - Process / operational effects on hearth stability - Hearth wear rate - monitoring techniques - NDT / Physical Core Drilling (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - Investigation of Yield Improvement through Crop Optimisation in the Port Talbot Hot Strip Mill (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - 'Process Control Information, Operation and Management Systems Upgrades and Enhancements at the TATA Steel UK Port Talbot site Blast Furnaces' (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - 'Imrproving the Capability of Manufacturing Low Sulphur Strip Steels without the use of a Synthetic Slag' (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - 'Investigation onto Heat Transfer in the Mould for Continuously Cast Steel Slabs and the Impact on Steel Surface Quality' (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - 'Blast Furnace Stove Optimisation and Automated Enrichment Control' (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - ''Investigation into the Effect of the Peripheral Distributor Road Development on Concentrations of Particulate Matter <10┬Ám within the Port Talbot Air Quality Management Area'' (1st Supervisor: Professor Georgios Fourlaris)
  • 2008 - 'Assessment of the Capability of the Exit Shear at the CAPL line to cut 2 mm gauge HSLA and dual phase steels' (1st Supervisor: Professor Georgios Fourlaris)
  • 2007 - An Assessment of the New Materials Being Considered for Gas Turbine Aero-engines and Their Contribution Towards the ACARE Targets. (2nd Supervisor: Professor Georgios Fourlaris)
  • 2007 - Life Cycle and Techno-Economic analysis of industrial sponge nickel catalysts used in hydrogenation reactions (2nd Supervisor: Professor Georgios Fourlaris)
  • 2007 - Life Cycle Analysis. (2nd Supervisor: Professor Georgios Fourlaris)
  • 2007 - Application of Thermal Desorption within Tata Steel Strip Products UK (1st Supervisor: Professor Georgios Fourlaris)
  • 2007 - Developing the Infrared Slag Detection System at the BOS Plant, Port Talbot Steel Works (1st Supervisor: Professor Georgios Fourlaris)
  • 2006 - Hot Rolling of Dual Phase 600 Strip Steel on Llanwern Hot Strip Mill. (1st Supervisor: Professor Georgios Fourlaris)
  • 2006 - Prevention of Transverse Cracking in Niobium Micro-alloyed Continuously Cast Steel Slabs (1st Supervisor: Professor Georgios Fourlaris)
  • 2006 - Investigation into the fitness of and influence of plant weighing systems on through-process yield from BOS vessel inputs to cast slab (1st Supervisor: Professor Georgios Fourlaris)
  • 2006 - Development of a processing route for producing galvanised dual phase steel at the zodiac galvanising line (1st Supervisor: Professor Georgios Fourlaris)
  • 2006 - Control of Galvanised Strip Surface Roughness Through Temper Mill at ZODIAC (1st Supervisor: Professor Georgios Fourlaris)
  • 2005 - Weld Repair of Castings. (2nd Supervisor: Professor Georgios Fourlaris)

MSc

  • 2010 - Optimisation of Grade 6 cobalt based powder in terms of particle size for laser cladding in the steel industry. (1st Supervisor: Professor Georgios Fourlaris)