Skip to main content

Dr. Yong-ho Sohn

Pegasus Professor



  • Ph.D. — Purdue University 


  • Alloy Design and Development for Additive Manufacturing: Laser Powder Bed Fusion and Powder Synthesis by Gas Atomization 
  • Diffusion Kinetics, Multicomponent Intrinsic, and Interdiffusion in Multiphase Alloys 
  • Thermotransport and Irradition-Enhanced Diffusion in Next-Generation Nuclear Fuels and Claddings 
  • Thermal Barrier Coatings and Protective Metallic/Ceramic Coatings, Oxidation, Hot Corrosion and Other Environmental Degradation in Gas Turbines 
  • Processing, Microstructure and Property Relations in Materials, Materials Characterization, Physical Metallurgy, Phase Transformations, and Materials Thermodynamics – Kinetics 

Awards and Honors

  • KSEA Engineer of the Year, 2020, Korean-American Scientists and Engineers Association 
  • Outstanding Materials Engineer Award, 2016, School of Materials Engineering, Purdue University 
  • Fellow of ASM International (FASM), Class of 2015, ASM International 
  • Research Incentive Award, 2017, 2012 and 2006, University of Central Florida 
  • Teaching Incentive Program Award, 2013 and 2007, University of Central Florida 
  • Faculty Early CAREER Award-Grant, 2003-08, Div. Mater. Res., National Science Foundation. 

Selected Publications* since 2020

  1. H. Hyer, L. Zhou, A. Mehta, S. Park, T. Huynh, S. Song, K. Cho, B. McWilliams, Y.H. Sohn, “Composition-Dependent Solidification Cracking of Aluminum-Silicon Alloys During Laser Powder Bed Fusion,” Acta Mater., in Press, 2021. 

  2. Ab. Mehta, Y.H. Sohn, “Investigation of sluggish diffusion in FCC Al0.25CoCrFeNi high entropy alloy,” Mater. Res. Lett., in Press, 2021. 

  3. H. Hyer, R. Newell, D. Matejczyk, S. Hsie, M. Anthony, L. Zhou, C. Kammerer, Y.H. Sohn, “Microstructural Development in As-Built and Heat Treated IN625 Component Additively Manufactured by Laser Powder Bed Fusion,” J. Phase Equil. Diff., in Press, 2021. 

  4. H. Hyer, L. Zhou, A. Mehta, Y.H. Sohn, “Effects of Alloy Composition and Solid-State Diffusion Kinetics of Powder Bed Fusion Cracking Susceptibility,” J. Phase Equil. Diff., Accepted for Publication, in Press, 2021. 

  5. Ab. Mehta, Y.H. Sohn, “High Entropy and Sluggish Diffusion “Core” Effects in Senary FCC Al-Co-Cr-Fe-Ni-Mn Alloys,” ACS: Combinatorial Science, 22 (2020) pp. 757-767. 

  6. L. Zhou, T. Huynh, S. Park, H. Hyer, A. Mehta, S. Song, Y. Bai, B. McWilliams, K. Cho, Y.H. Sohn, “Additive Manufacturing of Al - 10 wt.% Ce Alloy by Laser Powder Bed Fusion,” J Mater. Sci., 55 (2020) pp. 14611-14625. 

  7. H. Hyer, L. Zhou, S. Park, G. Gottsfritz, G. Benson, B. Tolentino, B. McWilliams, K. Cho, Y.H. Sohn, “Understanding the Laser Powder Bed Fusion of AlSi10Mg Alloy,” Metall. Microst., Anal. 9 (2020) pp. 484-502. 

  8. Ab. Mehta, L. Zhou, D.D. Keiser, Jr., Y.H. Sohn, “Anomalous Growth of Al8Mo3 Phase During Interdiffusin and Reaction between Al and Mo,” J. Nucl. Mater., (2020) 152337. 

  9. L. Zhou, H. Hyer, S. Thapliyal, R. Mishra, B. McWilliams, K. Cho, Y.H. Sohn, “Process-dependent Composition, Structure, and Printability of Al-Zn-Mg and Al-Zn-Mg-Sc-Zr Alloys Manufactured by Laser Powder Bed Fusion,” Metall. Mater. Trans. A, 51A (2020) 3215-3227. 

  10. Ab. Mehta, Y.H. Sohn, “Interdiffusion, Solubility Limit, and Role of Entropy in FCC Al-Co-Cr-Fe-Ni alloys,” Metall. Mater. Trans. A, 51A (2020) 3142-3153. 

  11. H. Hyer, L. Zhou, G. Benson, B. McWilliams, K. Cho, Y.H. Sohn, “Additive Manufacturing of Dense WE43 Magnesium Alloy by Laser Powder Bed Fusion,” Add. Manufac. 33 (2020) 101123.

  12. R. Newell, A. Mehta, D.D. Keiser Jr., Y.H. Sohn, “Phase Reversion Kinetics of Thermally Decomposed (α + γ') Phases to γ-phase in U – 10 wt.% Mo Alloy,” J. Nucl. Mater, 530 (2020) 151983. 

* 180+ journal publications with 5,640+ citations (h = 39; i10 = 80); for a complete listing of publications, see 

Professional Services and Other Synergistic Activities

  • Collaboration and Partnerships with US National Laboratories and US Industry: Idaho National Laboratory (INL), Oak Ridge National Laboratory (ORNL), Argonne National Laboratory (ANL), GE Aircraft Engine, GE Energy, Solar Turbines Incorporated, Pratt & Whitney, Siemens, Howmet Research Corporation, DWA, MC-21, Magnesium-Elektron, and Army Research Laboratory (ARL) 
  • Outreach: Organizer of ASM International Central Florida Chapter Materials Camp for middle and high school students; Assisted several middle and high school students on science project including a FL state finalist. 
  • Curricular Development: ABET Coordinator for Undergraduate Introductory Course on Materials Science and Engineering; Internet-based and Interactive-TV-based lecturing; Primary Lecturer for Graduate Introductory Course in Materials Science and Engineering 
  • Leadership and Professional Participation: 
    • Editorial Board member for Metallurgical and Materials Transactions, Published by Springer, ISSN: 2196-2936/2944. 
    • Associate Editor of Journal of Phase Equilibria and Diffusion, Published by Springer, ISSN: 1547-7037. o Co-Chief Editor of Diffusion Foundations, Published by Trans-Tech Publication Incorporated. 
    • Symposium Organizations and Session Chairs for ASM International, TMS, ACERS, MS&T 
    • Member of ASEE, TMS, ASM, ACERS, AWS, AVS, ASME, ASNT, Alpha Sigma Mu 
    • International Graduate Student Paper Contest Committee, ASM International, 2006 – Present. 
  • Typical Scholarly Review: Acta Mater., Additive Manuf., Scripta Mater., Metall. Mater. Trans. A, Mater. Sci. Eng. A, J. Mater. Res., J. Am. Ceram. Soc., CalcPhad, Phil. Mag. A, J. Thermal Spray Technol., Vacuum, Surf. Coat. Technol., J. Mater. Sci., Aerosp. Sci. Technol., Oxid. Met., National Science Foundation, Department of Energy, International Science & Technology Center, Engineering & Physical Sciences Research Council