EVALUATION OF ALTERNATIVE MICROCLEANLINESS METHODS

Wolfgang Schützenhöfer, Christina Decker, Bernhard Plank, Ernst Plesiutschnig

Research output: Chapter in Book/Report/Conference proceedingsConference contribution

Abstract

This study focuses on the development and comparison of standard- and alternative methods to evaluate the Micro-cleanliness of tool steels on a microscopic level. The steels subjected to this study are hot working- and plastic mould steels produced by an electric arc furnace (EAF) and ladle furnace (LF). After re-melting by an electric slag (ESR) or a vacuum arc (VAR) furnace the forged or rolled specimen were taken as subject for the investigation with different methods. The standard investigation method for non-metallic inclusions (NMI) is light optical microscopy (LOM). Upon giga cycle fatigue (GCF) tests, the NMI are additionally investigated by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS), electrolytic extraction method and X-ray computed tomography (XCT) with a maximum resolution of 1 µm voxel size. For comparative results the specimens used for XCT experiments (diameter of approx. 2 mm and length of approx. 20 mm) were destructively investigated with automated LOM. XCT for NMI is a reliable method. The inhomogeneities, which were found, are NMI and no digital artefacts or pores. Comparative results for the different production routes show a similar size of NMI within each method. Each method has its advantages and disadvantages concerning additional information, e.g. time for preparation and measurement and costs.
Translated title of the contributionEVALUATION OF ALTERNATIVE MICROCLEANLINESS METHODS
Original languageGerman
Title of host publicationProceedings of 10th International TOOL Conference (TOOL 2016)
Number of pages10
Publication statusPublished - 2016
Event10th International TOOL Conference (TOOL 2016) - Bratislava, Slovakia
Duration: 4 Oct 20167 Oct 2016
http://tool2016.org/

Conference

Conference10th International TOOL Conference (TOOL 2016)
Country/TerritorySlovakia
CityBratislava
Period04.10.201607.10.2016
Internet address

Keywords

  • X-ray computed tomography
  • micro-CT
  • non-metallic inclusions
  • cleanliness
  • steels
  • vacuum arc remelting
  • electric arc furnace
  • light-optical-microscopy
  • scanning electron microscopy

Fingerprint

Dive into the research topics of 'EVALUATION OF ALTERNATIVE MICROCLEANLINESS METHODS'. Together they form a unique fingerprint.

Cite this