Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Evaluation of Flow Stress using Geometric Conditions of Ball Indentation Tests

볼 압입 시험의 기하학적 조건과 유동 응력 곡선의 관계에 관한 연구

  • 이병섭 (한국원자력연구소 원자력재료기술개발부) ;
  • 이호진 (한국원자력연구소 원자력재료기술개발부) ;
  • 이봉상 (한국원자력연구소 원자력재료기술개발부)
  • Published : 2003.07.01
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Abstract

Ball indentation tests have been used to estimate the mechanical properties of materials by several investigators. In this study, load-depth curves from ball indentation tests were analyzed using the geometric conditions of the contact between ball and specimen. A series of numerical calculations and experimental results showed that the contact load-depth curves could be simplified by linear functions. Once we obtained the contact indentation depth from linearizing the experimental indentation curves, the estimation process of the flow properties became straight-forward and the scatter of results could be drastically reduced.

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References

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  1. A Study on the Unloading Stiffness of Instrumented Indentation Tests vol.13, pp.1, 2004, https://doi.org/10.5228/KSPP.2004.13.1.021