Dr Kathy Christofidou

PhD, MEng, MBA

Department of Materials Science and Engineering

Lecturer in Metallurgy

k.christofidou@sheffield.ac.uk

Sir Robert Hadfield Building

Full contact details

Dr Kathy Christofidou
Department of Materials Science and Engineering
Sir Robert Hadfield Building
Mappin Street
Sheffield
S1 3JD

Profile

Kathy (Katerina) Christofidou joined the department in 2019 as a Lecturer in Metallurgy.

Prior to this, she held roles at the University of Cambridge, as part of the Rolls-Royce University Technology Centre, and the University of Manchester, where she also worked in close collaboration with the Henry Royce Institute.

She holds a PhD in Metallurgy from the University of Cambridge and an MEng in Aerospace Materials Engineering from Imperial College London.

Research interests

Kathy's research focuses on multiple facets of high-temperature physical metallurgy, alloy design and manufacturing.

As part of her collaboration with Rolls-Royce PLC, she has developed new polycrystalline Ni-based superalloys for turbine disc applications, as well as exploring strategies for the design of high-temperature materials amenable to laser-based additive layer manufacturing.

In addition, a major area of her research interests is that of high entropy alloys and the possibilities that these materials offer for expanding our understanding of physical metallurgy beyond a single base element and the associated thermodynamic principles governing this behaviour.

Publications

Journal articles

Ferguson CG, Christofidou KA, Hildyard EM, Wilson AS, Jones NG & Stone HJ (2020) On the continuous and discontinuous precipitation of the L12 phase in Cu-Ni-Al alloys. Materialia.
Moffat JP, Whitfield TE, Christofidou KA, Pickering EJ, Jones NG & Stone HJ (2020) The effect of heat treatment on the oxidation resistance of cobalt-based superalloys. Metals, 10(2). View this article in WRRO
Whitfield TE, Pickering EJ, Christofidou KA, Jones CN, Stone HJ & Jones NG (2019) Elucidating the microstructural development of refractory metal high entropy superalloys via the Ti–Ta–Zr constituent system. Journal of Alloys and Compounds. View this article in WRRO
Bloomfield ME, Christofidou KA & Jones NG (2019) Effect of Co on the phase stability of CrMnFeCoxNi high entropy alloys following long-duration exposures at intermediate temperatures. Intermetallics, 114. View this article in WRRO
Pickering EJ, Christofidou KA, Stone HJ & Jones NG (2019) On the design and feasibility of tantalum-base superalloys. Journal of Alloys and Compounds, 804, 314-321. View this article in WRRO
Goodfellow AJ, Owen LR, Christofidou KA, Kelleher J, Hardy MC & Stone HJ (2019) The effect of temperature and mo content on the lattice misfit of model ni-based superalloys. Metals, 9(6). View this article in WRRO
Christofidou KA, McAuliffe TP, Mignanelli PM, Stone HJ & Jones NG (2019) On the prediction and the formation of the sigma phase in CrMnCoFeNix high entropy alloys. Journal of Alloys and Compounds, 770, 285-293. View this article in WRRO
Christofidou KA, Hardy MC, Li H-Y, Argyrakis C, Kitaguchi H, Jones NG, Mignanelli PM, Wilson AS, Messé OMDM, Pickering EJ , Gilbert RJ et al (2018) On the effect of Nb on the microstructure and properties of next generation polycrystalline powder metallurgy Ni-based superalloys. Metallurgical and Materials Transactions A, 49(9), 3896-3907. View this article in WRRO
Connor LD, Mignanelli PM, Christofidou KA, Jones NG, Baker AR, Tang CC, Guérin S & Stone HJ (2018) In situ study of sigma phase formation in Cr–Co–Ni ternary alloys at 800°C using the long duration experiment facility at Diamond Light Source. Journal of Synchrotron Radiation, 25(5), 1371-1378. View this article in WRRO
Goodfellow AJ, Galindo-Nava EI, Christofidou KA, Jones NG, Boyer CD, Martin TL, Bagot PAJ, Hardy MC & Stone HJ (2018) The effect of phase chemistry on the extent of strengthening mechanisms in model Ni-Cr-Al-Ti-Mo based superalloys. Acta Materialia, 153, 290-302. View this article in WRRO
Goodfellow AJ, Galindo-Nava EI, Christofidou KA, Jones NG, Martin T, Bagot PAJ, Boyer CD, Hardy MC & Stone HJ (2018) Gamma prime precipitate evolution during aging of a model nickel-based superalloy. Metallurgical and Materials Transactions A, 49(3), 718-728. View this article in WRRO
Christofidou KA, Pickering EJ, Orsatti P, Mignanelli PM, Slater TJA, Stone HJ & Jones NG (2018) On the influence of Mn on the phase stability of the CrMnxFeCoNi high entropy alloys. Intermetallics, 92, 84-92. View this article in WRRO

Chapters

Hardy MC, Argyrakis C, Kitaguchi HS, Wilson AS, Buckingham RC, Severs K, Yu S, Jackson C, Pickering EJ, Llewelyn SCH , Papadaki C et al (2020) Developing Alloy Compositions for Future High Temperature Disk Rotors, Superalloys 2020 (pp. 19-30). Springer International Publishing

Conference proceedings papers

Christofidou KA, Pang HT, Li W, Pardhi Y, Jones CN, Jones NG & Stone HJ (2020) Microstructural control and optimization of Haynes 282 manufactured through laser powder bed fusion. Superalloys 2020 : Proceedings of the 14th International Symposium on Superalloys (pp 1014-1023)

Professional activities

Member of the IoM3 Materials Chemistry Committee
Member of the TMS High Temperature Alloys Committee
Recipient of funding allocation from the Women in Engineering Visitor Funding Scheme at the University of New South Wales, Sydney, Australia
2019 Materials travel award