Stella Pedrazzini

Biography

2014 DPhil Materials Science (University of Oxford)

2010 MEng Materials Science (University of Oxford)

Research

Dr Stella Pedrazzini is a post-doc working on oxidation and hot corrosion of nickel superalloys, both single crystals and polycrystalline as part of the Rolls-Royce-EPSRC strategic partnership.

Her PhD was on characterisation, mechanical properties and thermal stability of nano-quasicrystalline aluminium matrix composites used in car pistons and airplane fuselage, completed in 2014 from the University of Oxford. After that, she joined the Oxford Atom Probe group for 3 years as a post-doc, splitting her time between two projects: (1) a multi-scale study of environmental degradation due to oxidative and corrosive conditions under applied stress in nickel based superalloys, projects industrially co-funded by Rolls-Royce plc., Siemens and Good Fabrications Performance Exhausts. (2) atomic scale characterisation of radiation damage on tuned perovskites for nuclear fusion and fission applications, funded by EPSRC.

Her main expertise lies in characterisation (SEM/TEM/FIB/XRD/APT/TKD/EDX...), mechanical testing (mostly quasi-static, some dynamic), thermal analysis (DSC, TGA...) and analytical modelling of the mechanical properties of metals, alloys and metal-matrix composites.

Publications

Key publications:

S. Pedrazzini, H. Gardner, J. O. Douglas, E. S. Kiseeva, P. M. Mignanelli, R. Escoube, G. M. Hughes, G. Chapman, P. D. Edmondson, H. J. Stone, D. De Lille, P. A. J. Bagot, Oxidation behaviour and microstructural evolution of an Inconel alloy in an engine exhaust environment, Oxidation of Metals, 2017, 1-20.
D. Barba, E. Alabort, S. Pedrazzini, D.M. Collins, A.J. Wilkinson, P.A.J. Bagot, M.P. Moody, A. Jérusalem, and R.C. Reed, On the microtwinning mechanism in a single crystal superalloy, Acta Materialia, 135 (2017), 314-329.
P. A. J. Bagot, O. B. W. Silk, J. O. Douglas, S. Pedrazzini, D. J. Crudden, T. L. Martin, M. C. Hardy, M. P. Moody, R. C. Reed, An Atom probe Tomography study of site preference and partitioning in a nickel-based superalloy, Acta Materialia, 125, (2017) 156-165.
D. Barba, S. Pedrazzini, A. Vilalta-Clemente, A. J. Wilkinson, A. Jerusalem, M. P. Moody, P. A. J. Bagot, R. C. Reed, Segregation at microtwin boundaries in a nickel based superalloy during creep, Scripta Materialia, 127 (2017) 37-40.
P. Kontis, S. Pedrazzini, Y. Gong, P. A. J. Bagot, M. P. Moody, R. C. Reed, On the role of boron on oxide scale formation in a new polycrystalline superalloy, Scripta Materialia, 127 (2017) 156-159.
P. Kontis, H. A. Mohd Yosof, S. Pedrazzini, K. L. Moore, P. A. J. Bagot, M. P. Moody, C. R. M. Grovenor, R. C. Reed, On the Effect of Boron on Grain Boundary Character of a New Polycrystalline Superalloy, Acta Materialia, 103 (2016), 688-699.
S. Pedrazzini, D. J. Child, G. West, S. S. Doak, M. C. Hardy, M. P. Moody, P. A. J. Bagot, Oxidation Behaviour of a Next Generation Polycrystalline Mn Containing Ni-based Superalloy, Scripta Materialia, 113 (2016) 51-54.
13. M. Segersall, P. Kontis, S. Pedrazzini, P. A. J. Bagot, M. P. Moody, J. Moverare and R. C. Reed, Thermal- mechanical Fatigue Behaviour of a New Single Crystal Superalloy: Effects of Re and Si Alloying, Acta Materialia 95 (2015) 456-467.

Other publications:

PEER REVIEWED PUBLICATIONS:

S. Pedrazzini, H. Gardner, J. O. Douglas, E. S. Kiseeva, P. M. Mignanelli, R. Escoube, G. M. Hughes, G. Chapman, P. D. Edmondson, H. J. Stone, D. De Lille, P. A. J. Bagot, Oxidation behaviour and microstructural evolution of an Inconel alloy in an engine exhaust environment, Oxidation of Metals, 2017, 1-20.
D. Barba, E. Alabort, S. Pedrazzini, D.M. Collins, A.J. Wilkinson, P.A.J. Bagot, M.P. Moody, A. Jérusalem, and R.C. Reed, On the microtwinning mechanism in a single crystal superalloy, Acta Materialia, 135 (2017), 314-329.
S. Pedrazzini, M. Galano, F. Audebert, G. D. W. Smith, Elevated Temperature Mechanical Behaviour of Nanoquasicrystalline Al93Fe3Cr2Ti2 Alloy and Composites, accepted for publication, Materials Science and Engineering A, Accepted manuscript in press.
S. Pedrazzini, A. J. London, B. Gault, S. Speller, C. R. M. Grovenor, M. Danaie, M. P. Moody, P. D. Edmondson, P. A. J. Bagot, Nano-scale stoichiometry analysis of a high temperature superconductor by atom probe tomography, January 2017, Microscopy and Microanalysis, p 1-11.
P. A. J. Bagot, O. B. W. Silk, J. O. Douglas, S. Pedrazzini, D. J. Crudden, T. L. Martin, M. C. Hardy, M. P. Moody, R. C. Reed, An Atom probe Tomography study of site preference and partitioning in a nickel-based superalloy, Acta Materialia, 125, (2017) 156-165.
D. Barba, S. Pedrazzini, A. Vilalta-Clemente, A. J. Wilkinson, A. Jerusalem, M. P. Moody, P. A. J. Bagot, R. C. Reed, Segregation at microtwin boundaries in a nickel based superalloy during creep, Scripta Materialia, 127 (2017) 37-40.
P. Kontis, S. Pedrazzini, Y. Gong, P. A. J. Bagot, M. P. Moody, R. C. Reed, On the role of boron on oxide scale formation in a new polycrystalline superalloy, Scripta Materialia, 127 (2017) 156-159.
S. Pedrazzini, M. Galano, F. Audebert, D. M. Collins, F. Hofmann, B. Abbey, A. M. Korsunsky, M. Lieblich, A. Garcia Escorial, Strengthening mechanisms in an Al-Fe-Cr-Ti nano-quasicrystalline alloy and composites, Materials Science and Engineering A, 672 (2016) 175-183.
M. Danaie, D. Kepaptsoglou, Q. M. Ramasse, C. Ophus, K. R. Whittle, S. Lawson, S. Pedrazzini, N. P. Young, P. A. J Bagot, P. D. Edmondson, Characterisation of ordering in an A-site deficient perovskite Ca(1- x)La(2x/3)TiO3, Inorganic chemistry, 2016, 55 (19), 9937-9948.
P. Kontis, H. A. Mohd Yosof, S. Pedrazzini, K. L. Moore, P. A. J. Bagot, M. P. Moody, C. R. M. Grovenor, R. C. Reed, On the Effect of Boron on Grain Boundary Character of a New Polycrystalline Superalloy, Acta Materialia, 103 (2016), 688-699.
S. Pedrazzini, D. J. Child, G. West, S. S. Doak, M. C. Hardy, M. P. Moody, P. A. J. Bagot, Oxidation Behaviour of a Next Generation Polycrystalline Mn Containing Ni-based Superalloy, Scripta Materialia, 113 (2016) 51-54.
M. Danaie, S. Pedrazzini, N. P. Young, P. A. J. Bagot, K. R. Whittle, P. D. Edmondson, TEM Chatacterisation of ion radiation damage in Ca(1-x)La(2x/3)TiO3 Perovskites, Microscopy and Microanalysis, 21 (2015), Suppl. 3, 1335.
M. Segersall, P. Kontis, S. Pedrazzini, P. A. J. Bagot, M. P. Moody, J. Moverare and R. C. Reed, Thermal- mechanical Fatigue Behaviour of a New Single Crystal Superalloy: Effects of Re and Si Alloying, Acta Materialia 95 (2015) 456-467.

CONFERENCE PRESENTATIONS, POSTERS AND PROCEEDINGS:

S. Pedrazzini, H. Gardner, J. O. Douglas, E.S. Kiseeva, R. Escoube, G. Chapman, D. De Lille, P.A.J. Bagot, H. J. Stone, In-service Environmental Degradation of an Inconel 625 Formula 1 Car Exhaust, Euromat 2017, Tessaloniki, Greece.
S. Pedrazzini, D. Barba, A. Vilalta-Clemente, A. Jérusalem, A.J. Wilkinson, R.C. Reed, M.P. Moody, P.A.J. Bagot, Correlative microscopy for quantitative measurements of microtwin boundary segregation in a single crystal nickel based superalloy, European Atom Probe Tomography workshop, Oxford, September 2016.
S. Pedrazzini, H. Gardner, J. O. Douglas, E.S. Kiseeva, R. Escoube, G.M. Hughes, G. Chapman, P.D. Edmondson, D. De Lille, P.A.J. Bagot, In-service Oxidation and Microstructural Evolution of a Nickel Superalloy in a Formula 1 Car Exhaust, European Atom probe tomography workshop, Oxford, September 2016.
D. Barba, S. Pedrazzini, P. A. J. Bagot, M. P. Moody, R. C. Reed, A. Jerusalem, Microtwinning in Ni-based superalloys: a coupled numerical-experimental approach, 15th European Mechanics of Materials Conference, Brussels, Belgium, September 2016.
S. Pedrazzini, J. Poplawsky, W. Guo, M. Castell, I. Martin, S. Strennen, A. J. London, B. Gault, M. P. Moody, P. D. Edmondson, P. A. J. Bagot, Atomic Scale Characterisation of Irradiated Yttrium Barium Copper Oxide and Strontium Titanate, Atom Probe Tomography and Microscopy conference, Seoul, South Korea, June 2016.
S. Pedrazzini, A. J. London, B. Gault, M. Danaie, G. Brittles, S. Speller, C. R. M. Grovenor, P. D. Edmondson, N. P. Young, P. A. J. Bagot, Oxygen stoichiometry and atomic scale characterisation of radiation damage in perovskite superconductor Yttrium Barium Copper Oxide for nuclear applications, MRS spring meeting, Phoenix, Arizona, USA, March 2016.
S. Pedrazzini, A. J. London, B. Gault, M. Danaie, G. Brittles, S. Speller, C. R. M. Grovenor, P. D. Edmondson, N. P. Young, P. A. J. Bagot, Oxygen stoichiometry and atomic scale characterisation of radiation damage in perovskite superconductor Yttrium Barium Copper Oxide for nuclear applications, TMS annual meeting, Knoxville, Tennessee, USA, February 2016.
P. Kontis, E. Alabort, S. Pedrazzini, D. M. Collins, P. A. J. Bagot, M. P. Moody, A. J. Wilkinson, R. C. Reed, The effect of boron alloying on a new polycrystalline superalloy, 2016 TMS annual meeting &exhibition, Knoxville, Tennessee, USA.
D. Barba, E. Alabort, S. Pedrazzini, A. Bagot, A. Vilalta-Clemente, A. Wilkinson, A. Jérusalem and R.C. Reed. Mid- Temperature Creep in Nickel-based Superalloys: The Microtwinning. 13th International Symposium on Superalloys, Seven Springs, PA, USA (2016).
S. Pedrazzini, P D Edmondson, S Lawson, A S Gandy, P A J Bagot, K Whittle, Atomic scale characterisation of radiation damage in tuned perovskites for nuclear applications, Nuclear Materials Conference, Clearwater, Florida, USA, 2014.
S. Pedrazzini, P D Edmondson, P A J Bagot, M Castell, I Martin, M P Moody, Atomic Scale Characterisation of Tuned Perovskites for Nuclear Applications, Atom Probe Tomography and Microscopy conference, Stuttgart, Germany, 2014.
M. Galano; F. Audebert; S. Pedrazzini; A. Knowles, A step change in Al based nanostructured alloys and composites, Indo-UK Joint Seminar on Functional and Energy Materials, Manufacturing and Structures (FAEMMS 2013) Hyderabad, India, 2013
S.Pedrazzini, M.Galano, F.Audebert, M. Lieblich, A. Garcia Escorial, GDW. Smith, A Study of the Strengthening Mechanisms of Al-based Nanostructured Composites, TMS Annual Meeting (San Antonio, TX USA), 2013
S.Pedrazzini, M.Galano, F.Audebert, GDW. Smith Microstructure and Mechanical Properties of Nanoquasicrystalline Al-based Composites, METALLICS CDT, (Manchester, UK), 2012
M. Galano, F. Audebert, N. Rounthwaite, S. Pedrazzini and X. Jiang, Development and Characterisation of Novel Nanostructured Al based Composites, CSBMM (Brazil), 2011
M. Galano, F. Audebert, N. Rounthwaite, S. Pedrazzini, G. W. Smith, Development of Quasicrystalline Metal - Metal composites with High Mechanical Performance, The 14th International Conference on Rapidly Quenched and Metastable Materials - RQ14 (Salvador, BA, Brazil), 2011
M. Galano, S. Pedrazzini, N. Rounthwaite, G. D. W. Smith, F. Audebert Al Based Nanocomposites for High Strength Applications, AEROMAT (Long Beach, CA, USA), 2011
M. Galano, S. Pedrazzini, N. Rounthwaite, F. Audebert, M. Lieblich, A. Garcia Escorial, G. W. Smith, A Scaling Up Study Of Quasicrystalline Nanocomposites, ISMANAM (Zurich, Switzerland), 2010
M. Galano, N. Rounthwaite, S. Pedrazzini, F. Audebert, M. Lieblich, A. G. Escorial, G.D.W. Smith, Al Based Quasicrystalline Nanocomposites for Elevated Temperature Applications, AEROMAT (Bellevue, WA, USA), 2010