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Application of the Disector to Determine the Distribution of True Interlamellar Spacing in Lamellar Microstructures

  • S. Sankaran , Piyush Pathak , Sandeep Sangal and K.A. Padmanabhan
Published/Copyright: May 13, 2013
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Practical Metallography
From the journal Practical Metallography Volume 47 Issue 4

Abstract

It is well known that the interlamellar spacing controls the mechanical properties of any material with a lamellar microstructure. It is also expected, although not yet established, that varying distribution of interlamellar spacing would also influence the properties. However, the problem of determining the distribution of interlamellar spacing from metallographic observations made on single 2D sections is almost intractable. A technique to estimate the true interlamellar spacing in a lamellar microstructure, using a 3D probe referred to as a disector, has been developed. This disector technique was used to obtain the distribution of true interlamellar spacing of pearlite in a microalloyed steel. The results indicate clearly that there is a significant variation of interlamellar spacing across pearlite colonies and also within individual colonies. In addition, it was possible to determine the overall distribution of interlamellar spacing.

Kurzfassung

Wie wohlbekannt ist, steuert der Abstand zwischen den Lamellen die mechanischen Eigenschaften jedes Werkstoffs, der eine lamellare Mikrostruktur aufweist. Auch wenn das noch nicht festgestellt ist, wird auch erwartet, dass sich Veränderungen der Verteilung des interlamellaren Abstands ebenfalls auf die Eigenschaften auswirken würden. Jedoch ist das Problem, die Verteilung des interlamellaren Abstands durch metallographische Messungen zu bestimmen, die an einzelnen 2D-Anschliffen getroffen werden, fast nicht zu bewältigen. Es wurde ein Verfahren entwickelt, um den interlamellaren Abstand in einer lamellaren Mikrostruktur mittels einer 3D-Sonde zu schätzen, die als Disector bezeichnet wird. Dieses Disector-Verfahren wurde angewandt, um die Verteilung des interlamellaren Abstands von Perlit in einem mikrolegierten Stahl zu erkennen. Die Ergebnisse zeigen deutlich an, dass eine sehr starke Variation des interlamellaren Abstands über die gesamten Perlitkolonien hin und auch innerhalb der Perlitkolonien vorhanden ist. Des Weiteren konnte die Gesamtverteilung des interlamellaren Abstands festgestellt werden.

Sankaran Shanmugam Assistant Professor at department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, India. Research interests include deformation processing of materials, mechanical behavior of materials, electron microscopy and stereology

Sandeep Sangal Professor at department of Metallurgical and Materials Engineering, Indian Institute of Technology Kanpur, India. Research interests include structure-property correlations, micro-structural characterization, stereology, image processing, and web-based educational aids

References/Literatur

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[5] Kurzydlowski, K. J.; Ralph, B.: (1995) The Quantitative Description of the Microstructure of Materials, CRC press.Search in Google Scholar

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Received: 2009-1-30
Accepted: 2010-1-6
Published Online: 2013-05-13
Published in Print: 2010-04-01

© 2010, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents/Inhalt
  3. Editorial
  4. Schnelle praktische Hilfe — jetzt noch innovativer, benutzerfreundlicher und vielseitiger
  5. Technical Contributions/Fachbeiträge
  6. An Investigation on Weldability of AISI 304 and AISI 1040 Steels on Friction Welding
  7. Application of the Disector to Determine the Distribution of True Interlamellar Spacing in Lamellar Microstructures
  8. Particle Distribution and Tool Wear in Friction Stir Processed Al-SiCp Coatings
https://doi.org/10.3139/147.110050

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents/Inhalt
  3. Editorial
  4. Schnelle praktische Hilfe — jetzt noch innovativer, benutzerfreundlicher und vielseitiger
  5. Technical Contributions/Fachbeiträge
  6. An Investigation on Weldability of AISI 304 and AISI 1040 Steels on Friction Welding
  7. Application of the Disector to Determine the Distribution of True Interlamellar Spacing in Lamellar Microstructures
  8. Particle Distribution and Tool Wear in Friction Stir Processed Al-SiCp Coatings
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