Sang-Ho Oh

Room 303, Sci. Bldg. I, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, Republic of Korea 37673 · shoh97@postech.ac.kr

Dr. Sang-Ho Oh is a postdoctoral researcher at POSTECH, Republic of Korea. His research centers on the design of advanced materials and optimization of their manufacturing processes, using multiscale computational materials science approach. He is an expert in computational thermodynamics, solid-state diffusion, and microstructure evolution. He utilizes the CALPHAD approach, (large-scale) atomistic simulations, diffusion simulations, and Monte Carlo Potts microstructure simulations.

Education & Experience

Postdoctoral Researcher

National Institute for Materials Science

Research Center for Structural Materials, Mechanical Properties Group

September 2025 – Present

Postdoctoral Researcher

Pohang University of Science and Technology

Computational Materials Science and Engineering Lab

Febraury 2024 – September 2025

Ph.D.

Pohang University of Science and Technology

Department of Materials Science & Engineering
Advisor: Prof. Byeong-Joo Lee

Febraury 2024

B.S.

Pohang University of Science and Technology

Department of Materials Science & Engineering

Febraury 2019

Specialty & Interest

Language
  • Korean [C2], English [C1-B2], Japanese [B2-B1]
  • ANSI C, FORTRAN, GNU BASH, ...
TOOL
  • KISSMD : an in-house molecular dynamics and statics code.
  • LAMMPS : a molecular dynamics simulation program from Sandia National Laboratories, supporting Message Passing Interface(MPI) for parallel computing.
  • Thermo-Calc : a package of software and database for CALPHAD method.
  • DICTRA : an add-on software package of Thermo-Calc for simulation of diffusion controlled reactions in multi-component alloy systems.
  • VASP : a first-principles calculation program from University of Vienna.
  • SHIMS : an in-house Monte Carlo Potts code for microstructure evolution simulations, supproting MPI for parallel computing.
Speciality & Interest
  • [Experienced] Atomic-level investigation of diffusion mechanism in metal alloy systems (pure metals, solid solutions, and intermetallic compounds).
  • [Experienced] Development of interatomic potentials (in 2NN MEAM formalism).
  • [Experienced] Construction of CALPHAD-type computational thermodynamic database.
  • [Experienced] Design of novel alloys based on CALPHAD calculation
  • [Experienced] Prediction of interface reaction products using a thermodynamic scheme.
  • [Experienced] Prediction of diffusion and interfacial reactions in multi-component alloy systems using a numerical approach (finite difference method with sharp-interface approach).
  • [Experienced] Prediction of thermal conduction and phase transformation during steel cord production using a numerical approach (finite difference method).
  • [Experienced] Development of a full-scale Monte Carlo Potts model which employs real-world variables.
  • [Experienced] Prediction of microstructure evolution using Monte Carlo Potts model: grain growth, intermetallic layer growth, and solidification.
  • [Experienced] Development of a novel Monte Carlo model for solidification.
  • [Interest] ........ Multiscale modeling and ICME study to develop advanced materials.
  • [Interest] ........ Prediction of texture evolution and abnormal grain growth using a realistic MC Potts model.
  • [Interest] ........ Development of MC Potts model for mesoscale solid-state diffusion simulation.

Publication

2025

Multiscale Computational Framework Linking Alloy Composition to Microstructure Evolution via Machine Learning and Nanoscale Analysis

Jaemin Wang, Hyeonseok Kwon, Sang-Ho Oh, Jae Heung Lee, Dae Won Yun, Hyungsoo Lee, Seong-Moon Seo, Young-Soo Yoo, Hi Won Jeong, Hyoung Seop Kim, and Byeong-Joo Lee, npj Comput. Mater. 11 (2025) 1-12. 10.1038/s41524-025-01730-2

The role of intermetallic compounds in mitigating liquid metal embrittlement in Al-Zn-Si coated steels

Daehoon Jeong, Sang-Ho Oh, Sung-Ho Kim, Seok-Hyun Hong, Suk-Kyu Lee, and Byeong-Joo Lee, and Sung-Joon Kim, Surf. Coat. Tech. 512 (2025) 132385. doi.org/10.1016/j.surfcoat.2025.132385

Multiscale computational model of TWIP and TRIP in medium/high entropy alloys

Yazhou Liu, Jaemin Wang, Sang-Ho Oh, Shengpeng Hu, Wei Fu, Xiaoguo Song, and Byeong-Joo Lee, J. Alloys Compd. 1022 (2025) 179770. doi.org/10.1016/j.jallcom.2025.179770

Interpretable and Physics-Informed Modeling of Solidification in Alloy Systems: A Generalized Framework for Multi-Component Prediction

Jaemin Wang, Hyeonseok Kwon, Sang-Ho Oh, Hyoung Seop Kim, and Byeong-Joo Lee, Acta Mater. 286 (2025) 120716. doi.org/10.1016/j.actamat.2025.120716

Significant improvement of strain hardening through massive coherent boundaries in nano-lamellar structured complex-concentrated alloys

Tae Jin Jang, You Na Lee, Ju-Hyun Baek, Sang-Ho Oh, Yeon Taek Choi, Byeong-Joo Lee, Hyoung Seop Kim, Alireza Zargaran, Seok Su Sohn, J. Mater. Res. Tech. 35 (2025) 176-184. doi.org/10.1016/j.jmrt.2025.01.012

Stochastic scaling of the time step length in a full-scale Monte Carlo Potts model

Sang-Ho Oh, Chan Lim, Byeong-Joo Lee, Comput. Mater. Sci. 249 (2025) 113644. doi.org/10.1016/j.commatsci.2024.113644

Ultrastrong and ductile CoNiMoAl medium-entropy alloys enabled by L12 nanoprecipitate-induced multiple deformation mechanisms

Min Young Sung, Tae Jin Jang, Sang Yoon Song, Gunjick Lee, Ken-Hee Ryou, Sang-Ho Oh, Byeong-Joo Lee, Pyuck-Pa Choi, Jörg Neugebauer, Blazej Grabowski, Fritz Körmann, Ikeda Yuji, Alireza Zargaran, Seok Su Sohn, J. Mater. Sci. Tech. 214 (2025) 72-86. doi.org/10.1016/j.jmst.2024.11.026

Restructuring the cell network of non-equiatomic CoCrFeNiMoC medium-entropy alloy fabricated by laser powder bed fusion

Hyeonseok Kwon, Eun Seong Kim, Yoon-Uk Heo, Jungho Choe, Rae Eon Kim, Soung Yeoul Ahn, Sang-Ho Oh, Jeong Min Park, Byeong-Joo Lee, Hyoung Seop Kim, J. Mater. Sci. Tech. 214 (2025) 143-152. doi.org/10.1016/j.jmst.2024.07.010

2024

Hierarchical ferrous medium entropy with heterogeneous precipitates embedded in core-shell grain structure for superior mechanical properties

Rae Eon Kim, Jae Heung Lee, Farahnaz Haftlang, Sang-Ho Oh, Byeong-Joo Lee, Qingfeng Wu, Yoon-Uk Heo, Hyoung Seop Kim, Acta Mater. 281 (2024) 120397. doi.org/10.1016/j.actamat.2024.120397

Variability Analysis of Nanoscale Ferroelectric Hf0.5Zr0.5O2 Device Utilizing Schottky Emission Current and Its Improvement Strategies

Kyumin Lee, Sang-Ho Oh, Hojung Jang, Sunhyeong Lee, Byeong-Joo Lee, Hyunsang Hwang, IEEE Electron Device Lett. 45.11 (2024) 2078-2081. doi.org/10.1109/LED.2024.3451968

Wear resistance enhancement by Cu nano-platelet in CrCoNiCu medium-entropy alloy films

Young Mok Kim, Tae Jin Jang, Donghyeon Chae, Boryung Yoo, Sang-Ho Oh, Hyungjo Seo, Seungjin Nam, Dogyun Byeon, Joungwook Kim, Byeong-Joo Lee, Pyuck-Pa Choi, Alireza Zargaran, Seok Su Sohn, J. Mater. Res. Tech. 32 (2024) 1589-1601. doi.org/10.1016/j.jmrt.2024.08.022

Si-enabled self-lubrication and wear resistance of CrCoNiSi medium-entropy alloy films

Young Mok Kim, Tae Jin Jang, Wansu Song, Hyeon-Seok Do,Sang-Ho Oh, Gyeongbeom Lee, Joungwook Kim, Eunsoo Yang, Byeong-Joo Lee, Ho Jang, Seok Su Sohn, J. Mater. Res. Tech. 30 (2024) 5429-5443. doi.org/10.1016/j.jmrt.2024.04.248

Formation of columnar grains during diffusional growth of Nb3Sn layer and its suppression

Sang-Ho Oh, Yang-Jin Jeong, Sin-Hye Na, Jiman Kim Byeong-Joo Lee, Acta Mater. 263 (2024) 119542. doi.org/10.1016/j.actamat.2023.119542

2023

A second nearest-neighbor modified embedded-atom method combined with a charge equilibration interatomic potential for the Al-O binary system

Jisu Lee, Joonho Ji, Sang-Ho Oh, Byeong-Joo Lee, Comput. Mater. Sci. 230 (2023) 112505. doi.org/10.1016/j.commatsci.2023.112505

Atomic behavior of Ti in A15 Nb3Sn and its effects on diffusional growth of Nb3Sn layer

Sang-Ho Oh, Yang-Jin Jeong, Sin-Hye Na, Jiman Kim, Alireza Zargaran Byeong-Joo Lee, J. Alloys Compd. 957 (2023) 170438. doi.org/10.1016/j.jallcom.2023.170438

A full-scale Monte Carlo Potts model and real time conversion under non-uniform temperature distribution

Sang-Ho Oh, Matae Lee, Byeong-Joo Lee, Mater. Des. 225 (2023) 111439. doi.org/10.1016/j.matdes.2022.111439

2022

Prediction of interfacial reaction between Cu and In during low-temperature soldering

Sang-Ho Oh, Kunmo Chu, Byeong-Joo Lee, J. Phase Equilibr. Diffus. 43 (2022) 876-882. doi.org/10.1007/s11669-022-01008-w

Diffusion in A15 Nb3Sn: An atomistic study

Sang-Ho Oh, Donghyuk Seol, Yang-Jin Jeong, Sin-Hye Na, Jiman Kim, Won-Seok Ko, Jong Bae Jeon, Byeong-Joo Lee, Acta Mater. 234 (2022) 118050. doi.org/10.1016/j.actamat.2022.118050

2021

Pressure dependence of thermodynamic interaction parameters for binary solid solution phases: An atomistic simulation study

Sang-Ho Oh, Xiao-Gang Lu, Qing Chen, Byeong-Joo Lee, Calphad 75 (2021) 102342. doi.org/10.1016/j.calphad.2021.102342

Second nearest-neighbor modified embedded-atom method interatomic potentials for the Mo-M (M = Al, Co, Cr, Fe, Ni, Ti) binary alloy systems

Sang-Ho Oh, Jin-Soo Kim, Chang Seo Park, Byeong-Joo Lee, Comput. Mater. Sci. 194 (2021) 110473. doi.org/10.1016/j.commatsci.2021.110473

2020

Second nearest-neighbor modified embedded-atom method interatomic potentials for the Co-M (M = Ti, V) binary systems

Sang-Ho Oh, Donghyuk Seol, Byeong-Joo Lee, Calphad 70 (2020) 101791. doi.org/10.1016/j.calphad.2020.101791

Second-nearest-neighbor modified embedded-atom method interatomic potential for Cu-M (M = Co, Mo) binary systems

Jaemin Wang, Sang-Ho Oh, Byeong-Joo Lee, Comput. Mater. Sci. 178 (2020) 109627. doi.org/10.1016/j.commatsci.2020.109627

Conference talk

2025

Stochastic scaling of time step in a full-scale Monte Carlo Potts model

Sang-Ho Oh, Chan Lim, and Byeong-Joo Lee, International Conference on Processing & Manufacturing of Advanced Materials (Thermec’) (2025) Tours, France.

Full-scale Monte Carlo Potts simulation for practical applications

Sang-Ho Oh and Byeong-Joo Lee, 52st International Conference on Computer Coupling of Phase Diagrams and Thermochemistry (CALPHAD) (2025) Busan, Republic of Korea.

Thermodynamic modeling of Mn-Ti-X-H quaternary systems

Sang-Ho Oh, MinAh Baek, Seunghyo Noh, Minwoo Kang, Jihye Park, Taewook Na, and Byeong-Joo Lee, Spring conference of the Korean Institute of Metals and Materials (2025) Jeju, Republic of Korea.

2024

Thermodynamic description of the Co-Cr-Fe-Mn-Ni-Ti multicomponent system

Sang-Ho Oh, Byeong-Joo Lee, Fall conference of the Korean Institute of Metals and Materials (2024) Pyeongchang, Republic of Korea.

Thermodynamic modeling of the Mn-Ti-H system

Sang-Ho Oh, Jaemin Wang, Seunghyo Noh, Minwoo Kang, Jihye Park, Byeong-Joo Lee, Fall conference of the Korean Institute of Metals and Materials (2024) Pyeongchang, Republic of Korea.

Understanding and Control of Nano-scale Grain Evolution in Nb3Sn Superconducting Wire

Sang-Ho Oh Yang-Jin Jeong, Sin-Hye Na, Jiman Kim, Byeong-Joo Lee, 22nd International Nanotech Symposium (Nano Korea Symposium) (2024) Ilsan, Republic of Korea.

Development of a novel Monte Carlo Potts model for solid-liquid phase transformations

Sang-Ho Oh, Byeong-Joo Lee, 51st International Conference on Computer Coupling of Phase Diagrams and Thermochemistry (CALPHAD) (2024) Mannheim, Germany.

A novel microstructure simulation model for solidification and melting based on Monte Carlo algorithm

Sang-Ho Oh, Byeong-Joo Lee, Spring conference of the Korean Institute of Metals and Materials (2024) Changwon, Republic of Korea.

2023

Microstructure evolution in growing Nb3Sn intermetallic layers: A CALPHAD-coupled Monte Carlo study

Sang-Ho Oh, Yang-Jin Jeong, Sin-Hye Na, Jiman Kim, Byeong-Joo Lee, Fall conference of the Korean Institute of Metals and Materials (2023) Daegu, Republic of Korea.

Columnar grain formation in A15 Nb3Sn layer: a CALPHAD-coupled Monte Carlo study

Sang-Ho Oh, Yang-Jin Jeong, Sin-Hye Na, Jiman Kim, Byeong-Joo Lee, 50th International Conference on Computer Coupling of Phase Diagrams and Thermochemistry (CALPHAD) (2023) Boston, United States.

Effect of alloying elements on diffusional growth of Nb3Sn layer

Sang-Ho Oh, Yang-Jin Jeong, Sin-Hye Na, Iksang Shin, Jiman Kim Byeong-Joo Lee, Spring conference of the Korean Institute of Metals and Materials (2023) Jeju, Republic of Korea.

Effect of Ti on the diffusional growth of A15 Nb3Sn

Sang-Ho Oh, Yang-Jin Jeong, Sin-Hye Na, Iksang Shin, Jiman Kim Byeong-Joo Lee, TMS 2023 Annual Meeting & Exhibition (2023) San Diego, United States of America.

2022

A full-scale Monte Carlo Potts model for grain growth

Sang-Ho Oh, Matae Lee, Byeong-Joo Lee, The 36th Conference on Advanced Structural Materials (2022) Gyeongju, Republic of Korea.

2021

The diffusion mechanism in A15 Nb3Sn: An atomistic study

Sang-Ho Oh, Byeong-Joo Lee, Fall conference of the Korean Institute of Metals and Materials (2021) Jeju, Republic of Korea.

2019

Second nearest-neighbor modified embedded-atom method interatomic potential for the Co-M (M = Ti, V) binary systems

Sang-Ho Oh, Donghyuk Seol, Byeong-Joo Lee, Fall conference of the Korean Institute of Metals and Materials (2019) Daegu, Republic of Korea.

Honors & Award

Special Prize for Academic Activity (2023)

Department of Materials Science & Engineering, Pohang University of Science and Technology

Award
FactSage Best Student Poster Award (2023)

50th international conference on Computer Coupling of Phase Diagram and Thermochemistry (CALPHAD)

Award
Best Student Oral Presentation Award (2023)

Fall conference of the Korean Institute of Metals and Materials

Award
Best Student Oral Presentation Award (2023)

Spring conference of the Korean Institute of Metals and Materials

Award
STT Hillert Grant for Graduate Students (2023)

Stiftelsen för Tillämpad Termodynamik, KTH Royal Institute of Technology

Fellowship
POSTECHIAN Fellowship (2023)

Pohang University of Science and Technology

Fellowship
Best Academic Paper Award (2022)

Department of Materials Science & Engineering, Pohang University of Science and Technology

Award