Dr Joao Quinta Da Fonseca

Joao Fonseca obtained his PhD in Materials Science in 2002 at the University of Leeds and worked as a research associate in Manchester before being appointed a lecturer in 2005. Joao works in the Materials Performance Centre, a research alliance established by BNFL with The University of Manchester in 2002. He is a member of the national council of the British Society for Strain Measurement, where he chairs the scientific and technical committee.

His research focuses on the complex, multi-scale behaviour of polycrystalline metal deformation. He works on characterising and modelling the inherently heterogeneous nature of metal deformation and its effects on materials performance. He is particularly interested in modelling intergranular and intragranular interactions during deformation using crystal plasticity finite element modelling and understanding how these can be introduced into current failure models of processes such as fatigue, cleavage fracture and stress corrosion cracking. This work is supported by in-situ studies of deformation, using synchrotron and neutron diffraction and full-field optical techniques such as image correlation (IC) and electronic laser speckle interferometry (ESPI).

• Musicale modelling of fracture
• Full-field strain mapping for structural integrity applications
• Deformation mechanisms in hexagonal metals
• Texture evolution in Zr alloys
• In-situ deformation studies using Image Correlation
• Effects of microstructure on the deformation mechanisms of Ni superalloys
• Luders bands in RPV steels

• J. Quinta da Fonseca, E.C. Oliver, P.S. Bate P.J. Withers. Evolution of intergranular stresses during in-situ straining of IF steel with different grain sizes, Mat. Sci. Eng., In Press 2006
• J. Quinta da Fonseca, E.C. Oliver, M.R. Daymond, P.S. Bate and P.J. Withers. Modelling the early stages of deformation using the finite element and self consistent approaches, submitted to Acta Metal., 2006
• J. Quinta da Fonseca, E.C. Oliver, P. Bate. Evolution of internal stresses during the plastic deformation of IF steel and their correlation with crystal orientation. Proceedings of ICOTOM 14, Materials Science Forum,495-497, 2005, 1055-1060
• P.S. Bate and J. Quinta da Fonseca. Texture development in the cold rolling of IF steel, Materials Science and Engineering A, Volume 380, Issues 1-2, 2004, 365-377
• J. Quinta da Fonseca, P.M. Mummery and P.J. Withers. Full-field strain mapping by optical correlation of micrographs acquired during deformation, Journal of Microscopy, 218, 2005, 9-21
• M. Preuss, J. Quinta da Fonseca, I. Kyriakoglou, P.J. Withers, G.J. Baxter. Characterisation of Gamma-Prime across inertia friction welded Alloy 720Li, Superalloy, 2004, 477-484
• E.C. Oliver, M.R. Daymond, J. Quinta da Fonseca, P.J. Withers, Intergranular Stress Evolution in Pure Titanium Studied by Neutron Diffraction And Self-Consistent Modelling. Journal of Neutron Research, 12, 2003, 33-37
• M. N. James, D. G. Hattingh, D.J. Hughes, L-W. Wei, E.A. Patterson and J. Quinta da Fonseca. Synchrotron diffraction investigation of the distribution and influence of residual stresses in fatigue, Fatigue Fracture of Engineering Materials and Structures, 27, 2004, 609-622