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People Jörg M.K. Wiezorek

Associate Professor, Department of Mechanical Engineering and Materials Science
William Kepler Whiteford Faculty Fellow

Email:
Phone: 412-624-0122
Fax: 412-624-8069
Office: BENDM 843

 

Education

PhD, Materials Science and Metallurgy, University of Cambridge, Cambridge, United Kingdom, 1994.

Professional Interests

Dr. Wiezorek's research expertise and interest center on the application of transmission electron microscopy (TEM)and other modern micro-characterization techniques for the study of advanced materials and processes.  He is particularly interested in combining experimental observations down to atomic level detail with the principles and practice of physical metallurgy and metal physics to study and explain the mechanical, magnetic and other physical properties of structural and functional materials, with an emphasis on intermetallic and metallic systems.  Physically accurate, micro-mechanistic models are then developed to explain the microstructural and phase transformation behavior and properties exhibited by the materials.  Recent research has focused on mechanical and physical properties and structural transformation phenomena in bulk and thin film nano-materials, including dynamic in-situ visualization of structural changes and property measurements. A new thrust is the study of the electronic structure of ferromagnetic intermetallics by combined quantitative diffraction experiments using electrons and X-rays, and first-principle theory and electronic structure calculations.  Dr. Wiezorek has published over 100 articles based on his research and teaches on crystallography, diffraction, electron microscopy and nano-analytical methods, structure of solids, dislocation theory and physical metallurgy.  He serves as Director Materials Science, the Materials Micro-Characterization Laboratory (MMCL), MSE Graduate Program Director and as associate editor and reviewer for archival journals.

Current research activities include:

  • The electron density, interatomic bonding and properties of tetragonal ferromagnetic intermetallics, e.g. comparing FePd and FePt;
  • The investigation of annealing phenomena, phase transformations and deformation mechanisms in bulk L1o-ordered intermetallic alloy systems, e.g. Fe-Pd, Fe-Pt, Mn-Al and Ti-Al compounds;
  • The nature of the ordering phenomena and evolution of microstructure and defect structure in ferromagnetic intermetallic thin films and nanoscale bulk intermetallics.
  • In-situ TEM, AFM and nanoindentation studies of the mechanisms of plasticity and fracture in nano-structured and layered materials systems.

Selected Publications

  • A.K. Kulovits, S.X. Mao and J.M.K. Wiezorek, “Microstructural Evolution in nanocrystalline Ni during Cold-Rolling”, Acta Materialia (2008) Vol. 56, in press.
  • Tae-Bong Hur, Hong Koo Kim, David Perello, Minhee Yun, Andreas Kulovits and Jörg Wiezorek, “Morphology and grain structure evolution during epitaxial growth of Ag films on native-oxide covered Si surface”, Journal of Applied Physics (2008) Vol. 103, 103507.
  • Zhiwei Shan, J.A. Knapp, D.M. Follstaedt, J.M.K. Wiezorek, E.A. Stach, S.X. Mao, “Inter- and Intra-grain agglomerate fracture in nanocrystalline nickel”, Physical Review Letters (2008) Vol. 100, 105502.
  • Zhiwei Shan, J.M.K. Wiezorek, J.A. Knapp, D.M. Follstaedt, S.X. Mao, “Large lattice strain in individual grains in nanocrystalline Ni”, Journal of Applied Physics (2008) Vol. 92, 091917.
  • Z. Shan, E.A. Stach, J.M.K. Wiezorek, J.A. Knapp, D.M. Follstaedt and S.X. Mao, “Dislocation Dynamics in Nanocrystalline Nickel”, Physical Review Letters (2007) Vol. 98, 095502.
  • P. Ohodnicki, B. Webler, A. Deshpande and J.M.K. Wiezorek, “Interpretation of Magnetic Force Microscopy Contrast using Commercially Available Batch Tips for Investigation of Surface Magnetic Domain Structure in Polycrystalline Bulk Equiatomic L1o FePd”, Metallurgical and Materials Transactions A (2007) Vol. 38, 2479-2487.
  • A.K. Kulovits, J.P. Leonard and J.M.K. Wiezorek, “Microstructrue of Pulsed Laser Deposited FePd Thin Films on amorphous and crystalline Substrates”, Intermetallics (2007) Vol. 15, 1606-1611.
  • A. Al-Ghaferi, P. Müllner, H. Heinrich, G. Kostorz and J.M.K. Wiezorek,“Elastic constants of equiatomic L10-ordered FePd single crystals”, Acta Materialia (2006) Vol. 54, 881-889.
  • A.R. Deshpande, J.R. Blachère and J.M.K. Wiezorek, "Texture Evolution in Combined Reaction Transformed Equiatomic Ferromagnetic L10-ordered FePd Intermetallics", Scripta Materialia (2006) Vol. 54, 955-960.
  • Z. Shan, E.A. Stach, J.M.K. Wiezorek, J.A. Knapp, D.M. Follstaedt and S.X. Mao, "Response to Technical Comment on ‘Grain Boundary Mediated Plasticity in Nanocrystalline Nickel’”, Science (2005) Vol. 308 (5720), 356d, www.sciencemag.org/cgi/content/full/308/5720/356d.
  • Z. Shan, E.A. Stach, J.M.K. Wiezorek ,  J.A. Knapp, D.M. Follstaedt and S.X. Mao, "Grain Boundary Mediated Plasticity in Nanocrystalline Nickel", Science (2004) Vol. 305 (5684), 654-657, www.sciencemag.org/cgi/content/abstract/305/5684/654.
  • A. Kulovits, J.M.K. Wiezorek, W.A. Soffa, W. Püschl and W. Pfeiler, "The influence of deformation by cold-work on L10-ordering in anisotropic FePd", Journal of Alloys and Compounds (2004) Vol. 378, 285-289.
  • A.R. Deshpande, H. Xu and J.M.K. Wiezorek, "Effects of grain size on coercivity of combined reaction processed FePd intermetallics", Acta Materialia (2004) Vol. 52 (10), 2903-2911.
  • A.R. Deshpande and J.M.K. Wiezorek,  "Magnetic age hardening of cold deformed bulk equiatomic Fe-Pd intermetallics during isothermal annealing", Journal of Magnetism and Magnetic Materials (2004) Vol. 270 (1/2) 157-166.
  • H. Xu and J.M.K. Wiezorek, “Transmission electron microscopy of room temperature deformed polytwinned L10-ordered FePd”, Acta Materialia (2004) Vol. 52  (2) 395-403.
  • A. Gupta and J.M.K. Wiezorek, "Microstructural evolution of PST-TiAl during low-rate micro-straining at 1023K in hard and soft orientations", Intermetallics (2003) Vol.  11 (6) 589-600.
  • H. Xu, H. Heinrich and J.M.K. Wiezorek, "Microstructural changes during annealing of FePd-based thin films", Intermetallics  (2003) Vol. 11 (9) 963-969.
  • C. Yanar, J.M.K. Wiezorek, V. Radmilovic and W.A. Soffa, "Massive Transformation and the Formation of Ferromagnetic L10 Phase in Manganese-Aluminum-Base Alloys", Metallurgical and Materials Transactions A (2002) Vol. 33A (8) 2413-2423.
  • C. Yanar, V. Radmilovic, W.A. Soffa and J.M.K. Wiezorek, "Evolution of Microstructure and Defect Structure in L10-0rdered Manganese Aluminide Permanent Magnet Alloys”, Intermetallics (2001) Vol. 9 (10-11) 949-954.
  • X.D. Zhang, F.C. Grensing, F. Meisenkothen, J.M.K. Wiezorek, G. Meyrrick and H.L. Fraser, ” Microstructural characterization of novel in-situ Al-Be composites”, Metallurgical and Materials Transactions A (2000) Vol 31(11) 2963-2971.
  • X.D. Zhang,  J.M.K. Wiezorek, H.L. Fraser, M.J. Kaufman and M.H. Loretto, "Planar defects in massively transformed Ti-Al alloys", Philosophical Magazine Letters (1999) Vol. 79, No. 8, 519-530.
  • J.M.K. Wiezorek, X.D. Zhang, W.A.T. Clark and H.L. Fraser, "Activation of Slip in Lamellae of a2-Ti3Al in TiAl Alloys", Philosophical Magazine A (1998) Vol. 78 (1) 217-238.

Curriculum Vitae

Dr. Jörg Wiezorek joined the faculty of the Swanson School of Engineering as Assistant Professor in the Department of Materials Science in the fall of 1998 and was promoted to Associate Professor with tenure in 2004. He received a Ph.D. in Materials Science and Metallurgy from the University of Cambridge, UK (1994) and obtained his Diploma (M.Sc. equivalent) in Physics from the University of Münster, Germany (1991). He was a post-doctoral fellow conducting materials research using advanced high-resolution and analytical transmission electron microscopy at The Ohio State University prior to his faculty appointment. He is an active member of materials related professional societies (e.g. TMS, MRS and MSA) and has co-organized the 46th International Field Emission Symposium, IFES 2000, and co-organized the 12th & 13th symposium on Advanced Ordered Intermetallic Alloys held at the MRS Fall Meeting 2006 and 2008, respectively. He received the National Science Foundation CAREER award (2001), held a Visiting Professor appointment at the Institute for Applied Physics at the Swiss Federal Institute of Technology (ETH) in Zurich, Switzerland (2002), and was awarded the Outstanding MSE Teacher Award (2003), the NCEM Visiting Scientist Fellowship from the Lawrence Berkeley National Laboratory, Berkeley, CA (2004), and the William Kepler Whiteford Faculty Fellowship from Pitt’s Swanson School of Engineering (2005/07).

 

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