Pitt HomeFind PeopleContact Us
School of Engineering

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 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.  Dr. Wiezorek has published over 80 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 of the Materials Micro-Characterization Laboratory (MMCL), MSE Graduate Program Director and as a reviewer for numerous archival journals as well as for national and international funding agencies.

Current research activities include:

  • 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.
  • The role of microstructural and annealing state on fatigue in high strength Al-alloys.

Selected Publications

     
  • 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.
  • A.R. Deshpande and J.M.K. Wiezorek, "Texture Evolution in equiaxed polycrystalline L1o-ordered FePd during Coarsening", INVITED, Zeitschrift für Metallkunde, Contribution to Special Issue Honoring Prof. G. Kostorz on Occasion of his 65th Birthday (2006) Vol. 97, 304-309.
  • 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.
  • J.M.K. Wiezorek, "Dislocation and Twin Interactions with Polytwin Interfaces in L10-ordered FePd", Intermetallics (2003) Vol.11 (1) 9-21.
  • S.X. Mao, X. Han and J.M. Wiezorek, "Fracture and cavitation in a constrained thin metal layer under a scale effect in layered materials", Philosophical Magazine (2003) Vol. 83 (15) 1807-1826.
  • 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.
  • J.M.K. Wiezorek and C.J. Humphreys, "On the Hierarchy of Planar Fault Energies in TiAl", Scripta Metallurgica et Materialia (1995) Vol. 33 (3) 451-458.

Selected Invited Lectures

March 8-12, 2004, Regensburg, Germany, Spring Meeting of German Physical Society (DPG), Invited Keynote Lecture, "Combined Reaction Processing of Fe-Pd based Ferromagnetic Intermetallics";

March 14-18, 2004, Charlotte, NC, Annual Meeting of TMS, NSF sponsored symposium 'The Future of Metals', Invited Keynote Lecture, "Nanostructured

Intermetallic Alloys - Annealing Behavior, Microstructural Control and Influence of Scale in Reversibly Ordering Systems";

April 12-16, 2004, San Francisco, CA, 2004 MRS Spring Meeting, Symposium “Interfacial Engineering for Optimized Properties III", Invited Lecture, "Slip Transfer across Hetero-Interfaces in two-phase Titanium Aluminum Intermetallics";

May 4, 2004, Bochum, Germany, Ruhr-University Bochum, Invited Seminar, "Combined Reaction Processing in the FePd System";

October 26, 2005, Stony Brook, NY, SUNY Stony Brook, Invited Seminar, “Deformation Processing of L1o-Ordering Iron-Palladium Intermetallics”;

Curriculum Vitae

Dr. Jörg Wiezorek joined the faculty of the Department of Mechanical Engineering and 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 at the Ohio State University prior to his faculty appointment. He is an active member of the materials related professional societies ASM International, TMS, MRS and MSA, and has co-organized the 46th International Field Emission Symposium, IFES 2000, and co-organizes the 12th symposium on Advanced Ordered Intermetallic Alloys to be held at the MRS Fall Meeting 2006. He received the National Science Foundation CAREER award (2001), a Visiting Professor appointment at the Institute for Applied Physics at the Swiss Federal Institute of Technology (ETH) in Zurich, Switzerland (2002), 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 (2005/07).

 

Benedum Hall

Dedicated in 1971, Benedum Hall is home to exploration and discovery.