Hyeji Im
    Post-Doctoral Researcher
    Ph.D., KAIST (Korea Advanced Institute of Science and Technology)

    Current project(s):

    Email: hyeji.im@northwestern.edu

I was born in South Korea and obtained M.S. and Ph.D. degrees in materials science and engineering at Korea Advanced Institute of Science and Technology (KAIST) in South Korea. During my Ph.D. program, I worked on development and characterization of W-free Co-based superalloys. I have been a guest researcher at Max-Planck-Institut für Eisenforschung for a year.

I joined the Dunand research group in 2021 and continue doing research on Co-based superalloys, especially in terms of additive manufacturing techniques.

Selected Honors


  1. M. S. Jeong, T. M. Park, D.-I Kim, H. Fujii, H. J. Im, P.-P Choi, S.-J Lee, J. Han, "Improving toughness of medium-Mn steels after friction stir welding through grain morphology tuning." Journal of Materials Science & Technology (accepted)
  2. H. J. Im, S. K. Makineni, C.-S Oh, B. Gault, P.-P Choi. "Elemental sub-lattice occupation and microstructural evolution in γ/γ' Co-Ti-Mo-Cr alloys." Microscopy and Microanalysis (accepted)
  3. H. J. Im, W. S. Choi, K. Ryou, T. H. Kang, J. B. Seol, W.-S Ko, P.-P Choi. "Enhanced microstructural stability of γ/γ'-strengthened Co-Ti-Mo-based alloys through Al additions." Acta Materialia, vol. 214, 2021, 117011.
  4. H. J. Im, S. Lee, W. S. Choi, S. K. Makineni, D. Raabe, W.-S Ko, P.-P Choi. "Effects of Mo on the mechanical behavior of γ/γ'-strengthened Co-Ti-based alloys." Acta Materialia, vol. 197, 2020, pp. 69-80.
  5. P.-P Choi, H. J. Im, C. Jung, K. H. Ryou, H. Jeong. "Atom Probe Tomography: Unveiling the elemental distribution in nanostructured materials with near-atomic resolution." Reference Module in Materials Science and Materials Engineering. 2020. Elsevier.
  6. J. Han, B. Yoo, H. J. Im, C.-S Oh, P.-P Choi. "Microstructural evolution of the heat affected zone of a Co-Ti-W alloy upon laser cladding with a CoNiCrAlY coating." Materials Characterization, vol. 158, 2019, 109998.
  7. B. Yoo, H. J. Im, J. B. Seol, P.-P Choi. "On the microstructural evolution and partitioning behavior of L12-structured γ'-based Co-Ti-W alloys upon Cr and Al alloying." Intermetallics, vol. 104, 2019, pp. 97-102.
  8. H. J. Im, J. Y. Oh, S. Ryu, S. H. Hong. "The design and fabrication of multilayered graded GNP/Ni/PMMA nanocomposite for enhanced EMI shielding behavior." RSC Advances, vol. 9, no. 20, 2019, pp. 11289-11295.
  9. H. J. Im, S. K. Makineni, B. Gault, F. Stein, D. Raabe, P.-P Choi. "Elemental partitioning and site-occupancy in γ/γ' forming Co-Ti-Mo and Co-Ti-Cr alloys." Scripta Materialia, vol. 154, 2018, pp. 159-162.
  10. H. J. Im, G. H. Jun, D. J. Lee, H. J. Ryu, S. H. Hong. "Enhanced electromagnetic interference shielding behavior of graphene nanoplatelet/Ni/Wax nanocomposites." Journal of Materials Chemistry C, vol. 5, no. 26, 2017, pp. 6471-6479.