한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제22권10호
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  • Pages.186-194
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  • 2005
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

나노 인덴테이션 실험과 유한요소해석을 이용한 전기아연도금강판의 코팅층 체적 거동 결정

Determination of Deformation Behavior of Coating Layer on Electronic galvanized Sheet Steel using Nano-indentation and FEM

  • 고영호 (부산대학교 기계정밀공학과) ;
  • 이정민 (부산대학교 기계정밀공학과) ;
  • 김병민 (부산대학교 정밀정형 및 금형가공연구소)
  • 발행 : 2005.10.01
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초록

This study was designed to investigate the mechanical properties of the coating layer on electronic galvanized sheet steel as a part of the ongoing research on the coated steel. Those properties were determined using nano-indentation, the finite element method, and artificial neural networks. First and foremost, the load-displacement curve (the loading-unloading curve) of coatings was derived from a nano-indentation test by CSM (continuous stiffness measurement) and was used to measure the elastic modulus and hardness of the coating layer. The properties derived were applied in FE simulations of a nano-indentation test, and the analytical results were compared with the experimental result. A numerical model for FE simulations was established for the coating layer and the substrate separately. Finally, to determine the mechanical properties of the coating, such as the stress-strain curve, functional equations of loading and unloading curves were introduced and computed using the neural networks method. The results show errors within $5\%$ in comparison with the load-displacement measured by a nano-indentation test.

키워드

참고문헌

  1. Anthony, C. Fischer-Cripps, 'Nanoindentation,' Spring-Verlag, pp. 20-29, 2001
  2. PelIetier, H., Krier, J., Cornet, A., Mille, P., 'Limits of using bilinear stress-strain curve for finite element modeling of nanoindentation response on bulk materials,' Thin solid film, 379, pp. 147-155, 2000 https://doi.org/10.1016/S0040-6090(00)01559-5
  3. Bouzakis, K. D., Michailidis, N., Erkens, G., 'Thin hard coatings stress-strain curve determination through a FEM supported evaluation of nanoindentation test results,' Surface & Coatings Technology, 142-144, pp. 102-109, 2001 https://doi.org/10.1016/S0257-8972(01)01275-0
  4. Pethica, J. B., Hutchings, R., Oliver, W. C., 'Hardness measurement at penetration depths as small as 20nm,' Philos. Mag. A, 48(4), pp. 593-606, 1983 https://doi.org/10.1080/01418618308234914
  5. Doerner, M. F., Nix, W. D., 'A method for interpreting the data from Depth-sensing Indentation,' J. of Mater. Res., Vol. 1, pp. 601-609, 1986 https://doi.org/10.1557/JMR.1986.0601
  6. Hahn, J. H., Lee, K. R., Kim, K. S., Lee, S. Y., 'Principal and applications of nanoindentation test,' J. of KSPE, Vol. 19, No. 3, pp. 19-26, 2002
  7. Oliver, W. C., Pharr, G. M., 'An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments,' J. of Mater. Res., Vol. 7, No. 6, pp. 1564-1583, 1992 https://doi.org/10.1557/JMR.1992.1564
  8. Sneddon, 'The Relation between load and penetration in the axisymmetric boussinesq problem for a punch of arbitrary profile,' Int. J. of Eng. Science, Vol. 3, pp. 47-57, 1965 https://doi.org/10.1016/0020-7225(65)90019-4
  9. Lu, C. J., Bogy, D. B., 'The effect of tip radius on nano-indentation hardness test,' Int. J. of Solids Structures, Vol. 32, No. 12, pp. 1759-1770, 1995 https://doi.org/10.1016/0020-7683(94)00194-2
  10. Bhattacharya, A. K., Nix, W. D., 'Analysis of elastic and plastic deformation associated with Indentation testing of thin Films on Substrates,' Int. J. of Solids Structures, Vol. 24, No. 12, pp. 1287-1298, 1988 https://doi.org/10.1016/0020-7683(88)90091-1
  11. Gan, L., Ben-Nissan, B., 'The effects of mechanical properties of thin films on nano-indentation data: Finite element analysis,' Computational Materials Science, 8, pp. 273-281, 1997 https://doi.org/10.1016/S0927-0256(97)00040-2
  12. Elghazal, H., Lormand, G., Hamel, A., Girodin, D., Vincent, A., 'Microplastic characteristics obtained through nano-indentation measurement : application to surface hardened steels,' Material Science and Engineering, A303, pp. 110-119, 2001 https://doi.org/10.1016/S0921-5093(00)01852-9