Ju-Young Kim

Postdoctoral Scholar

Education:

• Ph. D., Material Science and Engineering, Seoul National University, Korea
• B.S., Materials Science and Engineering, Seoul National University, Korea

Research Interests:

1. Fabrication of Defect-Free Materials
   • Synthesis of nanomaterials using chemical reactions and etching
   • Fabication of defect-free materials using e-beam lithography
     
     
2. Characterization of Size-Dependent Properties of Nanomaterials using Experiments and Computational Simulations
   • Characterization of homogeneous and inhomogeneous deformation behavior of nanomaterials
   • Size-dependent plasticity of nanomaterials
   • Plastic deformation mechanism of nanomaterials using TEM and molecular dynamics simulations
   • Defect nucleation and movement in nanomaterials using molecular dynamics simulations

Publications:

1. J.-Y. Kim, S.-K. Kang, J.R. Greer, and D. Kwon, “Evaluating plastic flow properties by characterizing indentation size effect using a sharp indenter,” Acta Materialia (in press) (2008).
2. S. Brinckmann, J.-Y. Kim, J.R. Greer, “Fundamental differences in mechanical behavior between two types of crystals at nano-scale,” Physical Review Letters 100: 155502 (2008).
3. K.-W. Lee, K.-H. Kim, J.-Y. Kim, and D. Kwon, “Derivation of tensile flow characteristics for austenitic materials from instrumented indentation technique,” Journal of Physics D: Applied Physics 41: 074014 (2008).
4. J.-i. Jang, B.-G. Yoo, and J.-Y. Kim, “Rate-dependent inhomogeneous-to-homogeneous transition of plastic flows during nanoindentation of bulk metallic glasses: Fact or artifact?,” Applied Physics Letters 90: 211907 (2007).
5. J.-Y. Kim, S.-K. Kang, J.-J. Lee, J.-i. Jang, Y.-H. Lee, and D. Kwon, “Influence of surface roughness on indentation size effect,” Acta Materialia 55: 3555 (2007).
6. Y.-H. Lee, J.-Y. Kim, U.-B. Baek, and S.-H. Nahm, “Stress characterization of surface damages on soda-lime glass using a nanocontact deformation method,” Journal of Materials Science 42: 8203 (2007).
7. Y.-H. Lee, J.-Y. Kim, U.-B. Baek, and S.-H. Nahm, “Multiaxial deformation characteristic of a Zr-based bulk metallic glass: Variations of the plastic constraint factor underneath a spherical indenter,” Journal of Materials Research 20: 2895 (2007).
8. B.-G. Yoo, J.-Y. Kim, and J.-I. Jang, “Influence of indenter geometry on the deformation behavior of Zr60Cu30Al10 bulk metallic glass during nanoindentation,” Materials Transactions, JIM 48: 1765 (2007).
9. Y.-H. Lee, J.-Y. Kim, S.-H. Nahm, and D. Kwon, “Loading rate effect on inelastic deformation in a Zr-based bulk metallic glass,” Materials Science and Engineering A 449-451: 185-188 (2007).
10. J.-Y. Kim, K.-W. Lee, J.-S. Lee, and D. Kwon, “Determination of tensile properties by instrumented indentation technique: Representative stress and strain approach,” Surface and Coatings Technology 201: 4278 (2006).
11. J.-Y. Kim, J.-J. Lee, Y.-H. Lee, J.-I. Jang, and D. Kwon, “Surface roughness effect in instrumented indentation: A simple contact depth model and its verification,” Journal of Materials Research 21: 2975 (2006).
12. J.-Y. Kim, J.-S. Lee, K.-W. Lee, K.-H. Kim, and D. Kwon, “Feasible evaluation of flow properties and stress state of structural materials using instrumented indentation tests,” Key Engineering Materials 326-328: 487 (2006).
13. Y.-H. Lee, Y.-H. Huh, J.-Y. Kim, S.-H. Nahm, J.-i. Jang, and D. Kwon, “Yield property characterization for Au and TiN thin films by applying nanoindentation technique,” Key Engineering Materials 326-328: 215 (2006).
14. Y.-H. Lee, J.-Y. Kim, J.-S. Lee, K.-H. Kim, J.Y. Koo, and D. Kwon, “Using the instrumented indentation technique for stress characterization of friction stir-welded API X80 steel,” Philosophical Magazine 86: 5497 (2006).
15. E.-c. Jeon, J.-Y. Kim, M.-K. Baik, S.-H. Kim, J.-S. Park, and D. Kwon, “Optimum definition of true strain beneath a spherical indenter for deriving indentation flow curves,” Materials Science and Engineering A 419: 196 (2006).
16. D. Son, J.-J. Kim, J.-Y. Kim, and D. Kwon, “Tensile properties and fatigue crack growth in LIGA nickel MEMS structures,” Materials Science and Engineering A 406: 274 (2005).
17. J.-Y. Kim, B.-W. Lee, D.T. Read, and D. Kwon, “Influence of tip bluntness on the size-dependent nanoindentation hardness,” Scripta Materialia 52: 353 (2005).
18. J.-Y. Kim, B.-W. Lee, H.-S. Nam, and D. Kwon, “Molecular dynamics analysis of structure and intrinsic stress in amorphous silicon carbide film with deposition process parameters,” Materials Science Forum 449-452: 97 (2004).
19. J.-Y. Kim, B.-W. Lee, H.-S. Nam, and D. Kwon, “Effect of substrate temperature on structure and intrinsic stress in vapor-deposited amorphous silicon carbide film,” Thin Solid Films 467: 294 (2004).
20. B.-W. Lee, J.-Y. Kim, and D. Kwon, “Stress-strain curves of flip-chip solder balls based on finite-element modeling of thermal displacements measured by electronic speckle pattern interferometry,” Journal of Electronic Materials 32: 1322 (2003).
21. B.-W. Lee, J.-H. Jeong, W.S. Jang, J.-Y. Kim, D.-W. Kim, D. Kwon, J.-W. Nah, and K.-W. Paik, “Determination of stress-strain curve for microelectronic solder joint by ESPI measurement and FE Analysis,” International Journal of Modern Physics B 17: 1983 (2003).

Contact:

Office Phone:626-395-6233
Fax: 626-396-8868
Mailing Address:

MC 309-81,
California Institute of Technology
1200 E California Blvd,
Pasadena, CA 91125