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• H. J. Im*, D. Dunand. Microstructure, hardness, and creep of Co-Fe-Ni-based high-entropy superalloy processed by laser powder-bed fusion. Materials Science and Engineering A, 916:147378, 2024.
• K. Ryou, Y. Park, H. J. Im, P.-P Choi. Prevention of hot cracking in Ni-based superalloy via passivation layer formation during additive manufacturing. Journal of Materials Research and Technology, 33:3155–3162, 2024.
• H. J. Im*, J. Santos, C. Campbell, D. Dunand. Co–Ni–Al–W γ/γ′ superalloy with Cr and Ti additions fabricated via laser fusion of elemental powders. Materials Science and Engineering A, 914:147105, 2024.
• H. J. Im*, J. Santos, C. Liu, C. Campbell, D. Dunand. Reduction of crack formation, microstructure and mechanical properties of γ’-strengthened Co-Ni-Al-W superalloys processed by selective laser melting. Additive Manufacturing, 76:103790, 2023.
• K. Ryou, H. J. Im, J. Park, P.-P Choi. Multiple mechanisms of preventing hot cracking in direct-laser-deposited Ni-based superalloy through Hf addition. Materials & Design, 234:112298, 2023.
• H. J. Im, K. Ryou, T. H. Kang, S. Jimbo, S. Nambu, J. Han, P.-P Choi. Thermal-driven microstructural changes and mechanical properties of 15-5PH stainless steel during directed energy deposition. Additive Manufacturing, 74:103729, 2023.
• 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, 118:243–254, 2022.
• 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, 28(4):1335–1339, 2022.
• 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, 214:117011, 2021.
• 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, 197:69–80, 2020.
• 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, 158:109998, 2019.
• 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, 104:97–102, 2019.
• 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, 154:1590-162, 2018.