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Computational Sciences & Mathematics

Staff information

Kyoo Sil Choi

Applied Computational Mathematics & Engineering
Scientist
Pacific Northwest National Laboratory
PO Box 999
MSIN: K7-90
Richland, WA 99352
509/372-6967

PNNL Publications

2014

  • Hu X, KS Choi, X Sun, and SF Golovashchenko. 2014. "Edge Fracture Prediction ofTraditional and Advanced Trimming Processes for AA6111-T4 Sheets." Journal of Manufacturing Science and Engineering 136(2):Article No. 021016.  doi:10.1115/1.4026273

2013

  • Sun X, KS Choi, and D Li. 2013. "Predicting the Influence of Pore Characteristics on Ductility of Thin-Walled High Pressure Die Casting Magnesium." Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing 572:45-55.  doi:10.1016/j.msea.2013.02.026

2012

  • Choi KS, A Soulami, D Li, X Sun, MA Khaleel, L Xu, and F Barlat. 2012. "Relationship between Material Properties and Local Formability of DP980 Steels." In SAE 2012 World Congress & & Exhibition, April 24, 2012, Detroit, Michigan, pp. SAE Technical Paper 2012-01-0042.  SAE International, Warrendale, PA.  doi:10.4271/2012-01-0042
  • Sun X, A Soulami, KS Choi, O Guzman, and WW Chen. 2012. "Effects of Sample Geometry and Loading Rate onTensile Ductility of TRIP800 Steel." Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing 541:1-7.  doi:10.1016/j.msea.2011.12.115

2011

  • Choi KS, A Soulami, WN Liu, X Sun, and MA Khaleel. 2011. "Loading Path Dependence of Forming Limit Diagram of a TRIP800 Steel." SAE International Journal of Materials and Manufacturing 4(1):75-83.  doi:10.4271/2011-01-0019
  • Lai C, BJ Koeppel, KS Choi, KP Recknagle, X Sun, LA Chick, VN Korolev, and MA Khaleel. 2011. "A Quasi-Two-Dimensional Electrochemistry Modeling Tool for Planar Solid Oxide Fuel Cell Stacks." Journal of Power Sources 196(6):3204-3222.  doi:10.1016/j.jpowsour.2010.11.123
  • Soulami A, KS Choi, YF Shen, WN Liu, X Sun, and MA Khaleel. 2011. "On deformation twinning in a 17.5%Mn-TWIP steel: A physically-based phenomenological model." Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing 528(3):1402-1408.  doi:10.1016/j.msea.2010.10.031

2010

  • Choi KS, A Soulami, WN Liu, X Sun, and MA Khaleel. 2010. "Effects of Retained Austenite Stability and Volume Fraction on Deformation Behaviors of TRIP Steels ." In AIST Steel Properties and Applications Conference Proceedings - Combined with MS and T'10, Materials Science and Technology, October 17-21, 2010, pp. 405-412.  Association for Iron and Steel Technology, Warrendale, PA. 
  • Choi KS, WN Liu, X Sun, and MA Khaleel. 2010. "Predicting Ductility and Failure Modes of TRIP Steels under Different Loading Conditions." In Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM 2010): AIP Conference Proceedings, vol. 1252, no. 2, ed. F Barlat, YH Moon and MG Lee, pp. 1265-1270.  American Institute of Physics, New York. 
  • Liu WN, KS Choi, A Soulami, X Sun, and MA Khaleel. 2010. "Effects of Forming Induced Phase Transformation on Crushing Behavior of TRIP Steel." In SAE 2010 World Congress& Exhibition, vol. SP-2295, pp. 21-28.  SAE International, Warrendale, PA.  doi:10.4271/2010-01-0216
  • Soulami A, KS Choi, WN Liu, X Sun, MA Khaleel, Y Ren, and YD Wang. 2010. "Predicting Fracture Toughness of TRIP 800 using Phase Properties Characterized by In-Situ High Energy X-Ray Diffraction." Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science 41(5):1261-1268. 

2009

  • Choi KS, and J Pan. 2009. "A Generalized Anisotropic Hardening Rule Based on the Mroz Multi-Yield-Surface Model for Pressure Insensitive and Sensitive Materials." International Journal of Plasticity 26(7):1325-1358.  doi:10.1016/j.ijplas.2008.09.005
  • Choi KS, A Soulami, WN Liu, X Sun, and MA Khaleel. 2009. "Applicability of a Micromechanics Model Based on Actual Microstructure for Failure Prediction of DP Steels." In SAE 2009 World Congress.  SAE International, Warrendale, PA. 
  • Choi KS, WN Liu, X Sun, and MA Khaleel. 2009. "Influence of Manufacturing Processes and Microstructures on the Performance and Manufacturability of Advanced High Strength Steels." Transactions of the ASME. Journal of Engineering Materials and Technology 131(4):Article Number: 041205.  doi:10.1115/1.3183778
  • Choi KS, WN Liu, X Sun, and MA Khaleel. 2009. "Influence of Martensite Mechanical Properties on Failure Mode and Ductility of Dual Phase Steels." Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science 40(4):796 - 809.  doi:doi:10.1007/s11661-009-9792-6
  • Choi KS, WN Liu, X Sun, and MA Khaleel. 2009. "Microstructure-Based Constitutive Modeling of TRIP Steel: Prediction of Ductility and Failure Modes under Different Loading Conditions." Acta materialia 57(8):2592-2604. 
  • Soulami A, KS Choi, WN Liu, X Sun, and MA Khaleel. 2009. "Characterization of the Fracture Toughness of TRIP 800 Sheet Steels Using Microstructure-Based Finite Element Analysis." In Vehicle Sensors and Actuators, 2009 .  Society of Automotive Engineers, Detroit, MI. 
  • Sun X, KS Choi, A Soulami, WN Liu, and MA Khaleel. 2009. "On Key Factors Influencing Ductile Fractures of Dual Phase (DP) Steels." Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing 526(1-2):140-149.  doi:10.1016/j.msea.2009.08.010
  • Sun X, KS Choi, WN Liu, and MA Khaleel. 2009. "Predicting Failure Modes and Ductility of Dual Phase Steels Using Plastic Strain Localization ." International Journal of Plasticity 25(10):1888-1909.  doi:http://dx.doi.org/10.1016/j.ijplas.2008.12.012

2008

  • Choi KS, WN Liu, X Sun, MA Khaleel, Y Ren, and YD Wang. 2008. "Advanced micromechanical model for transformation-induced plasticity steels with application of in-situ high energy x-ray diffraction method." Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science 39A(13):3089-3096. 
  • Sun X, WN Liu, KS Choi, MA Khaleel, Y Ren, N Jia, and YD Wang. 2008. "Modeling of Failure Modes Induced by Plastic Strain Localization in Dual Phase Steels." In Proceedings of the International Conference and Exhibition on Analysis & Testing of Materials, November 4-7, 2008, Beijing, China: Metallurgical Analysis, vol. 28, no. Suppl. 2, pp. 1419-1432.  International Conference and Exhibition on Analysis & Testing of Materials, Beijing, China. 

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