● 연구 분야
  - 삼차원 재료과학에 기반한 전산재료공학
  - 불균일재료의 마이크로, 매크로 모델링
  - 재료의 미세구조-거동의 상관관계에 관한 전산적, 실험적 접근법
  - 첨단우주항공재료의 기계적 거동 예측

● 수행중인 연구과제
  - 주요 금속간 화합물의 강화기구에 기반한 초기소성 모델 개발
  - 단결정의 결정소성모델링에 관한 기초적 연구

● 주요 경력
Associate Professor, School of Materials Science & Eng., Pusan National University, since 2013.
Research Scientist, UES, Inc. Dayton, OH, USA, 2002-2013.
Post-Doctoral Fellow, Civil & Environmental Engineering, Carnegie Mellon University, 2001-2002.
Key Reader (Board of Review), Metallurgical and Materials Transactions A, since 2007.

● 국외전문학술지 게재 논문
1. Y.S. Choi, M.A. Groeber, T.J. Turner, D.M. Dimiduk, C. Woodward, M.D. Uchic and T.A. Parthasarathy, “A crystal-plasticity FEM study on effects of simplified grain representation and mesh types on mesoscopic plasticity heterogeneities”, Materials Science and Engineering A., Vol. 553, pp. 37-44 (2012).
2. Y.S. Choi, T.A. Parthasarathy, C. Woodward, D.M. Dimiduk and M.D. Uchic, “Constitutive model for anisotropic creep behaviors of single-crystal Ni-base superalloys in the low-temperature, high-stress regime”, Metallurgical and Materials Transactions A, Vol. 43A, pp. 1861-1869 (2012).
3. Y.S. Choi and T.A. Parthasarathy, “A crystal-plasticity finite element method study on effect of abnormally large grain on mesoscopic plasticity of polycrystal”, Scripta Materialia, Vol. 66, pp. 56-59 (2011).
4. A.D. Rollett, R.A. Lebensohn, M. Groeber, Y.S. Choi, J. Li and G. Rohrer, “Stress Hot Spots in Viscoplastic Deformation of Polycrystals,” Manuscript submitted to Modeling and Simulations in Materials Science and Engineering, Vol. 18, No.7, pp. 074005 (2010).
5. P.A. Shade, R. Wheeler, Y.S. Choi, M.D. Uchic, D.M. Dimiduk and H.L Fraser, " A combined experimental and computational study to examine lateral constraint effects on single-slip oriented microcompression experiments," Acta Materialia, Vol. 58, No. 15, pp. 4580-4587 (2009).
6. Y.S. Choi, D.M. Dimiduk, M.D. Uchic and T.A. Parthasarathy, "Modeling plasticity of Ni3Al-based L12 intermetallic single crystals. II. Two-step (T1 & T2) deformation behaviour," Philosophical Magazine, Vol. 87, No.30, pp. 4759-4775 (2007).
7. Y.S. Choi, D.M. Dimiduk, M.D. Uchic and T.A. Parthasarathy, "Modeling plasticity of Ni3Al-based L12 intermetallic single crystals. I. Anomalous temperature dependence of the flow behaviour," Philosophical Magazine, Vol. 87, No. 12, pp. 1939-1965 (2007).
8. Y.S. Choi, M.D. Uchic, T.A. Parthasarathy and D.M. Dimiduk, "Numerical study on microcompression tests of anisotropic single crystals," Scripta Materialia, Vol. 57, No. 9, pp. 849-852 (2007).
9. Y.S. Choi, H.R. Piehler and A.D. Rollett, "Introduction and application of modified surface roughness parameters based on the topographical distributions of peaks and valleys," Materials Characterization, Vol. 58, No. 10, pp. 901-908 (2007).
10. Y.S. Choi, A.D. Rollett and H.R. Piehler, "Application of two-point orientation auto-correlation function (TP-OACF)," Materials Transactions (J. Japan Inst. Metals), Vol. 47, No. 5, pp. 1313-1316 (2006).
11. Y.S. Choi, T.A. Parthasarathy, D.M. Dimiduk and M.D. Uchic, "Microstructural effects in modeling the flow behavior of single-crystal superalloys,” Metallurgical and Materials Transactions A, Vol. 37, No. 3, pp. 545-550 (2006).
12. Y.S. Choi, D.M. Dimiduk, M.D. Uchic and T.A. Parthasarathy, "A crystallographic constitutive model for Ni3Al(L12) intermetallics," Materials Science and Engineering A, Vol. 400-401, No. 1-2, pp. 256-259 (2005).
13. Y.S. Choi, T.A. Parthasarathy, D.M. Dimiduk and M.D. Uchic, "Numerical study of the flow responses and the geometric constraint effects in Ni-base two-phase single crystals using strain gradient plasticity," Materials Science and Engineering A, Vol. 397, No. 1-2, pp. 69-83 (2005).
14. Y.S. Choi, I.M. Park, J.H. Kim, K.M. Cho and D.L. Lee, "Effect of Si on the thermo-mechanical deformation and spheroidization of medium-carbon steels," Metals & Materials International (J. Korea Inst. Metals), Vol. 11, No. 4, pp. 327-332 (2005).
15. H. Tang, Y.S. Choi, A. Acharya and S. Saigal, “Effects of lattice incompatibility-induced-hardening on the fracture behavior of ductile single crystals," Journal of the Mechanics and Physics of Solids, Vol. 52, No. 12, pp. 2841-2867 (2004).
16. Y.S. Choi, H. R. Piehler and A. D. Rollett, “Formation of meso-scale roughening in 6022-T4 Al sheets deformed in plane-strain tension,” Metallurgical and Materials Transactions A, Vol. 35, No. 2, pp. 513-524 (2004).