Estimation of Particle Size of Nodular Graphite in Ductile Iron by Polarizing Optical Microscope Analysis

• Kotake Shigeo

  三重大学工学部機械工学科

• Suzuki Yasuyuki

  同　工博

• Senoo Masafumi

  同　工博

• Yamada Yasuo

  名古屋工業技術研究所

• Nishio Toshiyuki

  名古屋工業技術研究所

Bibliographic Information

Other Title

• 偏光顕微鏡像解析による鋳鉄中の球状黒鉛粒径の評価方法
• ヘンコウ ケンビキョウ ゾウ カイセキ ニヨル チュウテツチュウ ノ キュウジ

Abstract

  The polarizing optical microscopic analysis was applied to the estimation of the particle size on the spheroidal graphite in ductile iron by using optical uniaxial property of graphite. The image was stored from CCD to a computer for analyzing each pixel. The polarizing images of spheroidal graphite at the intersection can be explained from the optical calculation on the specific orientation of the graphite grains. The quantitative effects of thermal noise, dark current, surface topography and irregular orientation of graphite were reduced from the integration of the whole image data. From the comparison between the observed and calculated images, relation between the integration and the distance from the intersection to the center of the sphere was clarified. The theoretical formula was proposed to evaluate the radius of each spheroidal graphite grain.

Journal

• Journal of Japan Foundry Engineering Society

  Journal of Japan Foundry Engineering Society 70 (10), 716-721, 1998

  Japan Foundry Engineering Society

Keywords

• spheroidal graphite
• polarizing optical microscopy
• particle size analysis
• crystal orientation
• uniaxial optical crystal

Details

• CRID: 1390282681484387968
• NII Article ID: 10002554249
• NII Book ID: AN10514770
• DOI: 10.11279/jfes.70.716
• ISSN: 21855374
• ISSN: 13420429
• NDL BIB ID: 4591343
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4591343
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed