Joseph T Mckeown

Group Leader, Metallurgy & Advanced Microscopy
Materials Science Division
Phone: +19254221708


  • Ph.D., Materials Science and Engineering, University of California at Berkeley, 2007
  • M.S., Materials Science and Engineering, University of California at Berkeley, 2003
  • B.S., Materials Science and Engineering, University of California at Berkeley, 2000

Research Interests

  • Process-structure-properties relationships in metals and alloys
  • Additive manufacturing of metals
  • Alloy design
  • Dynamic transmission electron microscopy to study materials phenomena with high spatio-temporal resolution
  • In-situ techniques in the transmission electron microscope


  • V. Bathula, C. Liu, K. Zweiacker, J.T. McKeown, J.M.K. Wiezorek, “Interface velocity dependent solute trapping and phase selection during rapid solidification of laser melted hypo-eutectic Al-11at.%Cu alloy,” Acta Materialia 195 (2020) 341.
  • R.G. Mariano, A. Yau, J.T. McKeown, M. Kumar, and M.W. Kanan, “Mapping the grain structure of nanoparticles using a scanning electron microscope,” ACS Omega 5 (2020) 2791.
  • T. Pinomaa, J.T. McKeown, J.M.K. Wiezorek, N. Provatas, A. Laukkanen, and T. Suhonen, “Phase field modeling of rapid resolidification of Al-Cu thin films,” Journal of Crystal Growth 532 (2020) 125418.
  • R. Shi, S.A. Khairallah, T.T. Roehling, T.W. Heo, J.T. McKeown, and M.J. Matthews, “Microstructural control in metal laser powder bed fusion additive manufacturing using laser beam shaping strategy,” Acta Materialia 184 (2020) 284.
  • B.W. Reed, A.A. Moghadam, R.S. Bloom, S.T. Park, A.M. Monterrosa, P.M. Price, C.M. Barr, S.M. Briggs, K. Hattar, J.T. McKeown, and D.J. Masiel, “Electrostatic subframing and compressive-sensing video in transmission electron microscopy,” Structural Dynamics 6 (2019) 054303.
  • G.H. Campbell, J.T. McKeown, and M.K. Santala, “High-speed electron microscopy,” in Handbook of Microscopy, P. Hawkes and J.C.H. Spence, eds. (New York: Springer, 2019).
  • N.J. Ray, J.-H. Yoo, J.T. McKeown, S. Elhadj, S.H. Baxamusa, M.A. Johnson, H.T. Nguyen, W.A. Steele, J.M. Chesser, M.J. Matthews, and E. Feigenbaum, “Enhanced tunability of gold nanoparticle size, spacing, and shape for large-scale plasmonic arrays,” ACS Applied Nanomaterials 2 (2019) 4395.
  • R. Shi, S. Khairallah, T.-W. Heo, M. Rolchigo, J.T. McKeown, and M.J. Matthews, “An integrated simulation framework for additively manufactured Ti-6Al-4V: melt pool dynamics, microstructure, solid state phase transformation, and micro-elastic response,” JOM 71 (2019) 3640.
  • J.-H. Yoo, H.T. Nguyen, N.J. Ray, M.A. Johnson, W.A. Steele, J.M. Chesser, S.H. Baxamusa, S. Elhadj, J.T. McKeown, M.J. Matthews, E. Feigenbaum, “Scalable light-printing of substrate-engraved free-form metasurfaces,” ACS Applied Materials & Interfaces 11 (2019) 22684.
  • Z. Li, T. Voisin, J.T. McKeown, J. Ye, T. Braun, C. Kamath, W.E. King, and Y.M. Wang, “Tensile properties, strain rate sensitivity, and activation volume of additively manufactured 316L stainless steels,” International Journal of Plasticity 120 (2019) 395.
  • J.D. Roehling, W.L. Smith, T.T. Roehling, B. Vrancken, G.M. Guss, J.T. McKeown, M.R. Hill, and M.J. Matthews, “Reducing residual stress by selective large-area diode surface heating during laser powder bed fusion additive manufacturing,” Additive Manufacturing 28 (2019) 228.
  • J.D. Roehling, A.W. Stokes, D. Bober, G.M. Guss, A. Perron, T.T. Li, J.-L. Fattebert, P.E.A. Turchi, A.J. Clarke, M.J. Matthews, and J.T. McKeown, “Rapid solidification in bulk Nb-Ti alloys by single-track laser remelting,” JOM 70 (2018)1589.
  • G.C. Egan, T.T. Li, J.D. Roehling, J.T. McKeown, and G.H. Campbell, “In situ dynamic TEM characterization of unsteady crystallization during laser processing of amorphous germanium,” Acta Materialia 143 (2018) 13.
  • A. Perron, J.D. Roehling, P.E.A. Turchi, J.-L. Fattebert, and J.T. McKeown, “Matching time and spatial scales of rapid solidification: Dynamic TEM experiments coupled to CALPHAD-informed phase-field simulations,” Modelling and Simulation in Materials Science and Engineering 26 (2018) 014002.
  • K. Zweiacker, C. Liu, M.A. Gordillo, J.T. McKeown, G.H. Campbell, and J.M.K. Wiezorek, “Composition and automated crystal orientation mapping of rapid solidification products in hypoeutectic Al-4at.%Cu alloys,” Acta Materialia 145 (2018) 71.
  • Y.M. Wang, T. Voisin, J.T. McKeown, J. Ye, N.P. Calta, Z. Li, Z. Zheng, Y. Zhang, W. Chen, T.T. Roehling, R.T. Ott, M.K. Santala, P.J. Depond, M.J. Mathews, A.V. Hamza, and T. Zhu, “Additively manufactured hierarchical stainless steels with high strength and ductility,” Nature Materials 17 (2017) 63.
  • J.D. Roehling, D.R. Coughlin, J.W. Gibbs, J.K. Baldwin, J.C.E. Mertens, G.H. Campbell, A.J. Clarke, and J.T. McKeown, “Rapid solidification growth mode transitions in Al-Si alloys by dynamic transmission electron microscopy,” Acta Materialia 131 (2017) 22.
  • J.T. McKeown, K. Zweiacker, C. Liu, D.R. Coughlin, A.J. Clarke, J.K. Baldwin, J.W. Gibbs, J.D. Roehling, S.D. Imhoff, P.J. Gibbs, D. Tourret, J.M.K. Wiezorek, and G.H. Campbell, “Time-resolved in situ measurements during rapid alloy solidification: Experimental insight for additive manufacturing,” JOM 68 (2016) 985.
  • J.T. McKeown, L.L. Hsiung, J.-M. Park, H.-J. Ryu, P.E.A. Turchi, and W.E. King, “Size-dependent microstructures in rapidly solidified uranium-niobium powder particles,” Journal of Nuclear Materials 479 (2016) 1.
  • K. Zweiacker, J.T. McKeown, C. Liu, T. LaGrange, B.W. Reed, G.H. Campbell, and J.M.K. Wiezorek, “Determination of crystal growth rates during rapid solidification of polycrystalline aluminum by nano-scale spatio-temporal in situ transmission electron microscopy,” Journal of Applied Physics 120 (2016) 055106.
  • Verdaguer-Casadevall, C.W. Li, T.P. Johansson, S.B. Scott, J.T. McKeown, I.E.L. Stephens, M. Kumar, M.W. Kanan, and I. Chorkendorff, “Probing the active sites for CO reduction on oxide-derived copper electrocatalysts,” Journal of the American Chemical Society 137 (2015) 9808.
  • J.T. McKeown, Y. Wu, J.D. Fowlkes, P.D. Rack, and G.H. Campbell, “Simultaneous in-situ synthesis and characterization of Co@Cu core-shell nanoparticle arrays,” Advanced Materials 27 (2015) 1060.
  • G.H. Campbell, J.T. McKeown, and M.K. Santala, “Time resolved electron microscopy for in situ experiments,” Applied Physics Reviews 1 (2014) 041101.
  • J.T. McKeown, L.L. Hsiung, H.-J. Ryu, J.-M. Park, P.E.A. Turchi, and W.E. King, “Rapidly solidified U-6wt%Nb powders for dispersion-type nuclear fuels,” Journal of Nuclear Materials 448 (2014) 72.
  • J.T. McKeown, A.K. Kulovits, C. Liu, K. Zweiacker, B.W. Reed, T. LaGrange, J.M.K. Wiezorek, and G.H. Campbell, “In situ transmission electron microscopy of crystal growth-mode transitions during rapid solidification of a hypoeutectic Al-Cu alloy,” Acta Materialia 65 (2014) 56.
  • S. Mehraeen, J.T. McKeown, P.V Deshmukh, J.E. Evans, P. Abellan, P. Xu, B.W. Reed, M.L. Taheri, P.E. Fischione, and N.D. Browning, “A (S)TEM gas cell holder with localized laser heating for in-situ experiments,” Microscopy and Microanalysis 19 (2013) 470.
  • J.T. McKeown, S. Irukuvarghula, S. Ahn, M. Wall, L.L. Hsiung, S. McDeavitt, and P.E.A. Turchi, “Coexistence of the a and d phases in an as-cast uranium-rich U-Zr alloy,” Journal of Nuclear Materials 436 (2013) 100.
  • J.T. McKeown, N.A. Roberts, J.D. Fowlkes, Y. Wu, T. LaGrange, B.W. Reed, G.H. Campbell, and P.D. Rack, “Real-time observation of nanosecond liquid-phase assembly of nickel nanoparticles via pulsed-laser heating,” Langmuir 28 (2012) 17168.
  • T. LaGrange, B.W. Reed, M.K. Santala, J.T. McKeown, A. Kulovits, J.M.K. Wiezorek, L. Nikolova, F. Rosei, B.J. Siwick, and G.H. Campbell, “Approaches for ultrafast imaging of transient materials processes in the transmission electron microscope,” Micron 43 (2012) 1108.
  • N.D. Browning, M.A. Bonds, G.H. Campbell, J.E. Evans, T. LaGrange, K.L. Jungjohann, D.J. Masiel, J.T. McKeown, S. Mehraeen, B.W. Reed, and M.K. Santala, “Recent developments in dynamic transmission electron microscopy,” Current Opinion in Solid State & Materials Science 16 (2012) 23.
  • J.T. McKeown, V.R. Radmilovic, R. Gronsky, and A.M. Glaeser, “Silicide characterization at alumina-niobium interfaces,” Journal of Materials Science 46 (2011) 3969.
  • D.P. DePonte, J.T. McKeown, U. Weierstall, R.B. Doak, and J.C.H. Spence, “Towards ETEM serial crystallography: Electron diffraction from liquid jets,” Ultramicroscopy 111 (2011) 824.
  • J.D. Sugar, J.T. McKeown, V.R. Radmilovic, A.M. Glaeser, and R. Gronsky, “Encapsulation-induced stabilization of dimensionally restricted metallic-alloy wires,” Acta Materialia 58 (2010) 5332.
  • J.T. McKeown and J.C.H. Spence, “The kinematic convergent-beam electron diffraction method for nanocrystal structure determination,” Journal of Applied Physics 106 (2009) 074309.
  • S.M. Hong, C.C. Bartlow, T.B. Reynolds, J.T. McKeown, and A.M. Glaeser, “Ultrarapid transient-liquid-phase bonding of Al2O3 ceramics,” Advanced Materials 20 (2009) 4799.
  • J.D. Sugar, J.T. McKeown, T. Akashi, S.M. Hong, K. Nakashima, and A.M. Glaeser, “Transient-liquid-phase and liquid-film-assisted joining of ceramics,” Journal of the European Ceramic Society 26 (2006) 363.
  • J.D. Sugar, J.T. McKeown, V.R. Radmilovic, A.M.Glaeser, and R. Gronsky, “Spatially confined alloy single crystals for model studies of volumetrically constrained phase transformations,” Applied Physics Letters 89 (2006) 173102.
  • J.T. McKeown, J.D. Sugar, R. Gronsky, and A.M. Glaeser, “Effects of impurities on alumina-niobium interfacial microstructures,” Materials Characterization 57 (2006) 50.
  • J.T. McKeown, J.D. Sugar, R. Gronsky, and A.M. Glaeser, “Processing of alumina-niobium interfaces via liquid-film-assisted joining,” Welding Journal 84 (2005) 41.
  • J.D. Sugar, J.T. McKeown, R.A. Marks, and A.M. Glaeser, “Liquid-film assisted formation of alumina/niobium interfaces,” Journal of the American Ceramic Society 85 (2002) 2523.
  • J. McKeown, A. Misra, H. Kung, R.G. Hoagland, and M. Nastasi, “Microstructures and strength of nanoscale Cu-Ag multilayers,” Scripta Materialia 46 (2002) 593.