Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Non-contact Measurement and Analysis of Surface Hardness on Welding Steel using Laser-induced Breakdown Spectroscopy

레이저 유도 플라즈마 분광 기법을 이용한 용접 연강에서의 비접촉 강도 측정과 해석

  • Kim, Joohan (Department of Mechanical and Automotive Engineering, Seoul National Univ. of Science and Tech.) ;
  • Ko, Chansol (Department of Mechanical and Automotive Engineering, Seoul National Univ. of Science and Tech.)
  • 김주한 (서울과학기술대학교 기계.자동차공학과) ;
  • 고찬솔 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2013.12.02
  • Accepted : 2014.01.06
  • Published : 2014.02.01
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Abstract

In this work, effects of plasma on different hardness of welding steel using laser-induced breakdown spectroscopy were investigated. The ratios of ionic to atomic spectrum peaks were related to its material hardness. The major spectrum peak (Fe) and minor spectrum peak (Mn) were considered as monitoring elements. The stronger repulse plasma was generated, the harder material it was. The ratios of ionic to atomic spectrum peaks increased with respect to the material hardness as well. The correlation of minor spectrum peaks was stronger than that of major spectrum peaks. However, the major spectrum peaks indicated a similar trend, which could be used to estimate the hardness, too. Based on this result, the method could be used as a non-contact remote measurement of material properties.

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References

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