Chief Investigator

Dr. Matthew R. Barnett

BEng – Metallurgy, Royal Melbourne Institute of Technology, 1993
PhD – Metallurgy, McGill University, 1997

School of Engineering and Technology
Deakin University, Pigdons Rd, Geelong, VIC, 3217
Phone: +61 (3) 5227 2797  Fax: +61 (3) 5227 1103

Research interests

Professor Barnett's primary research interests are in the mechanical metallurgy of light metals. His recent research has focussed on magnesium and its alloys. Under this topic he has projects concerned with i) developing a new fast extruding magnesium alloy, ii) determining and modelling the role of deformation twinning in the mechanical response during wrought processing and in service, iii) improving the low temperature ductility and iv) understanding recrystallization. He is also very much interested in the Hall-Petch effect in Mg and Ti and in the development of deformation structures in Al.

In these projects, the objective is to develop and exploit understanding of the role played by the structure in plastic deformation and to link this to its evolution. Deformation twinning, high strain dislocation structures and dynamic recrystallization are all mechanisms that create new high angle boundaries during deformation. Professor Barnett employs electron backscattering diffraction (EBSD) to capture statistically significant samples of these boundaries. These data form the basis of much of his analysis.

Selected publications

  1. Matthew R. Barnett, Mark D. Nave & Alireza Ghaderi, "Yield point elongation due to twinning in a magnesium alloy", Acta Materialia, Vol.60, Issue 4, February 2012, Pages 1433-1443.
  2. Matthew R. Barnett, "A practical condition for migration dynamic recrystallisation", Acta Materialia, Vol.55, Issue 9, May 2007, Pages 3271-3278.
  3. Matthew R. Barnett,; Z. Keshavarz, A.G. Beer& D. Atwell, "Influence of grain size on the compressive deformation of wrought Mg–3Al–1Zn", Acta Materialia, Vol.52, Issue 17, 4 October 2004, Pages 5093-5103.
  4. Matthew R. Barnett, Z. Keshavarz, A.G. Beer& X. Ma, "Non-Schmid behaviour during secondary twinning in a polycrystalline magnesium alloy", Acta Materialia, Vol.56, Issue 1, January 2008, Pages 5-15.
  5. Matthew R. Barnett & F. Montheillet, "The generation of new high-angle boundaries in aluminium during hot torsion", Acta Materialia, Vol.50, Issue 9, 24 May 2002, Pages 2285-2296.
  6. Alireza Ghaderi & Matthew R. Barnett, "Sensitivity of deformation twinning to grain size in titanium and magnesium", Acta Materialia, Vol.59, Issue 20, December 2011, Pages 7824-7839.
  7. O. Muránsky, Matthew R. Barnett, D.G. Carr, S.C. Vogel & E.C. Oliver, "Investigation of deformation twinning in a fine-grained and coarse-grained ZM20 Mg alloy: Combined in situ neutron diffraction and acoustic emission", Acta Materialia, Vol.58, Issue 5, March 2010, Pages 1503-1517.
  8. Nicole Stanford, Dale Atwell & Matthew R. Barnett, "The effect of Gd on the recrystallisation, texture and deformation behaviour of magnesium-based alloys", Acta Materialia, Vol.58, Issue 20, December 2010.
  9. J.D. Robson, N. Stanford & Matthew R. Barnett, "Effect of precipitate shape on slip and twinning in magnesium alloys", Acta Materialia, Vol.59, Issue 5, March 2011, Pages 1945-1956.
  10. Filip Siska, Mahendra Ramajayam, Daniel Fabijanic & Matthew R. Barnett, "Internal material 'architecture' for a kink-resistant metal tube", Acta Materialia, available online 15 October 2012.