Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Determination of the Mechanical Properties of the Coated Layer in the Sheet Metal Using Load-Displacement Curve by Nanoindentation Technique

나노 인덴테이션의 하중-변위 곡선을 이용한 용융아연도금 강판 코팅층의 기계적 특성 결정

  • 고영호 (부산대학교 정밀기계공학과) ;
  • 이정민 (부산대학교 정밀기계공학과) ;
  • 김병민 (부산대학교 정밀정형 및 금형가공연구소)
  • Published : 2004.12.01
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Abstract

Mechanical properties such as Young's modulus and hardness of thin film in coated steel are difficult to determine by nano-indentation from the conventional analysis using the load-displacement curve. Therefore, an analysis of the nano-indentation loading-unloading curve was used to determine the Young's modulus, hardness. A new method is recently being developed for elastic-plastic properties of materials from nano-indentation. Elastic modulus of the thin films shows relatively small influence whereas yield strength is found to have significant effect on measured data. The load-displacement curves of material tested with a Berkovich indenter and nano-indentation continuous stiffness method is used to measure the modulus and hardness through thin films, and then these are computed using the analysis procedure. The developed neural networks apply also to obtain reliable mechanical properties.

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References

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