Joseph T. Mckeown

Portrait of  Joseph T. Mckeown

  • Title
    Group Leader, Metallurgy & Advanced Microscopy
  • Email
  • Phone
    (925) 422-1708
  • Organization
    Not Available

Professional Background

Joseph McKeown earned a Ph.D. in Materials Science and Engineering from the University of California at Berkeley. After a postdoctoral fellowship in the Department of Physics at Arizona State University, he joined Lawrence Livermore National Laboratory in 2010.

As Group Leader for Metallurgy and Advanced Microscopy within the Materials Science Division, Dr. McKeown leads an interdisciplinary group of >25 staff scientists and postdocs. The research focus areas of the group include advanced manufacturing, alloy and process development, advanced characterization, and process-structure-property-performance relationships in metals and alloys.

Research Interests

  • Advanced and Additive Manufacturing
  • Alloy design
  • Materials characterization, including in situ and dynamic electron microscopy
  • Process-structure-property-performance relationships


Dynamic Transmission Electron Microscopy

Additive Manufacturing

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

Selected Publications

  1. K.L. Elder, J. Berry, B. Bocklund, S.K. McCall, A. Perron, and J.T. McKeown, “Computational discovery of ultra-strong, stable, and lightweight refractory multi-principal element alloys. Part I: Design principles and rapid down-selection,” npj Comput. Mater. 9, 84 (2023).
  2. K.L. Elder, J. Berry, A. Perron, B. Bocklund, J. Shittu, C.J. Rietema, H.B. Henderson, S.K. McCall, and J.T. McKeown, “Computational discovery of ultra-strong, stable, and lightweight refractory multi-principal element alloys. Part II: Comprehensive ternary design and validation,” npj Comput. Mater. 9, 88 (2023).
  3. P. Söderlind, A. Landa, R.Q. Hood, E.E. Moore, A. Perron, and J.T. McKeown, “High-temperature thermodynamics modeling of graphite,” Appl. Sci. 12 (2022) 7556.
  4. J. Berry, A. Perron, J.-L. Fattebert, J.D. Roehling, B. Vrancken, T.T. Roehling, D.L. Rosas, J.A. Turner, S.A. Khairallah, J.T. McKeown, and M.J. Matthews, “Toward multiscale simulations of tailored microstructure formation in metal additive manufacturing,” Mater. Today 51, 65 (2021).
  5. P. Jreidini, T. Pinomaa, J.M.K. Wiezorek, J.T. McKeown, A. Laukkanen, and N. Provatas, “Orientation gradients in rapidly solidified pure aluminum thin films: Comparison of experiments and phase-field crystal simulations,” Phys. Rev. Lett. 127, 205701 (2021).
  6. J.T. McKeown, A.J. Clarke, and J.M.K. Wiezorek, “Imaging transient solidification behavior,” MRS Bulletin 45, 96 (2020).
  7. I. Han, J.T. McKeown, L. Tang, C.-Z. Wang, H. Parsamehr, Z. Xi, Y.-R. Lu, M.J. Kramer, and A.J. Shahani, “Dynamic observation of dendritic quasicrystal growth upon laser-induced solid-state transformation,” Phys. Rev. Lett. 125, 195503 (2020).
  8. J.D. Sugar, J.T. McKeown, D. Banga, J.R. Michael, “Comparison and optimization of orientation image mapping in SEM and TEM,” Microsc. Microanal. 26, 630 (2020).
  9. R.G. Mariano, A. Yau, J.T. McKeown, M. Kumar, and M.W. Kanan, “Comparing scanning electron microscope and transmission electron microscope grain mapping techniques applied to well-defined and highly irregular nanoparticles,” ACS Omega 5, 2791 (2020).
  10. 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,” J. Cryst. Growth 532, 125418 (2020).
  11. 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 Mater. 184, 284 (2020).
  12. 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).
  13. 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,” Addit. Manuf. 28, 228 (2019).
  14. 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, 1589 (2018).
  15. 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 Mater. 17, 63 (2018).
  16. 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, 985 (2016).
  17. 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,” J. Nucl. Mater. 479, 1 (2016).
  18. 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,” Adv. Mater. 27, 1060 (2015).
  19. 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,” Ultramicrosc. 111, 824 (2011).
  20. J.T. McKeown and J.C.H. Spence, “The kinematic convergent-beam electron diffraction method for nanocrystal structure determination,” J. Appl. Phys. 106, 074309 (2009).


For a full list, see: Google Scholar | ORCID


  • Department of Energy, Secretary’s Honor Award, NNSA,2022
  • WCI Silver Award, LLNL, 2022
  • PLS Winter Directorate Award, Excellence in Publication, LLNL, 2022
  • PLS Summer Directorate Award, Outstanding Postdoctoral Advisor, LLNL, 2021
  • Director’s Science and Technology Award, LLNL, 2018
  • Deputy Director’s Science & Technology Excellence in Publication Award, LLNL, 2018
  • Physical and Life Sciences Directorate Publication Award, LLNL, 2018
  • Defense Technologies Engineering Division Award, LLNL, 2017
  • Physical and Life Sciences Directorate Spot Award, LLNL, 2015
  • Hertz Fellowship Summer Research Internship, 2001


The Minerals, Metals & Materials Society (TMS), 2013 – Present

Professional Services

Key Reader, Metallurgical and Materials Transactions A, 2018 – Present