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Method for the Detection of Grain Boundaries in α Ti-Based Alloys by means of Polarized Light Microscopy and Image Processing in MATLAB

  • L. Morales-Rivas , S. Diederichs , L. Böhme , E. Gordo , A. Hebestreit and E. Kerscher
Published/Copyright: September 25, 2018
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Practical Metallography
From the journal Practical Metallography Volume 55 Issue 10

Abstract

Metallographic methods which are typically comprising chemical etching processes are applied to reveal grain boundaries in sections of metallic materials. In the case of an optically anisotropic material, grain boundaries can also be detected suing polarized light microscopy (PLM). To this end, the identification of grain boundaries, an automated image processing procedure, based on PLM, was developed. In this context, two different α Ti-based alloys were examined: a cast, non-porous rod material and a material obtained by powder metallurgy which, owing to its high porosity, places specific demands on the image processing system. The present work outlines the underlying metallographic and computer-based methods.

Kurzfassung

Um Korngrenzen in Schliffen metallischer Werkstoffe sichtbar zu machen, werden metallographische Methoden angewendet, die für gewöhnlich chemische Ätzvorgänge beinhalten. Handelt es sich um einen optisch anisotropen Werkstoff, so ist es auch möglich, Korngrenzen mittels polarisierter Lichtmikroskopie (PLM) zu detektieren. Dazu wurde eine automatisierte, auf PLM-Aufnahmen basierende Bildverarbeitungsprozedur zur Identifikation von Korngrenzen entwickelt. Hierbei wurden zwei verschiedene α-Ti-Basislegierungen untersucht: Ein gegossenes porenfreies Stabmaterial und ein pulvermetallurgisch hergestelltes Material, das aufgrund der hohen Porosität besondere Anforderungen an die Bildverarbeitung stellt. In der vorliegenden Arbeit werden die hierbei zugrunde liegenden metallographischen und computergestützten Methoden erläutert.

Translation: E. Engert

References / Literatur

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Received: 2018-01-24
Accepted: 2018-05-07
Published Online: 2018-09-25
Published in Print: 2018-10-15

© 2018, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Microstructural Characterization of Martensitic Q&P Steels – a Comparison of Etching Techniques and Electron Backscatter Diffraction
  7. Method for the Detection of Grain Boundaries in α Ti-Based Alloys by means of Polarized Light Microscopy and Image Processing in MATLAB
  8. Investigation of the Precipitation Behavior of H-Carbides in a TiAl Alloy containing Carbon by means of in- and ex-situ Characterization
  9. Wear and Damage Characterization of Coated Carbide Tools by means of FIB-SEM Microscopy
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
https://doi.org/10.3139/147.110515

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Microstructural Characterization of Martensitic Q&P Steels – a Comparison of Etching Techniques and Electron Backscatter Diffraction
  7. Method for the Detection of Grain Boundaries in α Ti-Based Alloys by means of Polarized Light Microscopy and Image Processing in MATLAB
  8. Investigation of the Precipitation Behavior of H-Carbides in a TiAl Alloy containing Carbon by means of in- and ex-situ Characterization
  9. Wear and Damage Characterization of Coated Carbide Tools by means of FIB-SEM Microscopy
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
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