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Quantitative metallography of multiphase steels

Mittwoch (21.09.2016)
17:35 - 17:55 Uhr Hörsaal B
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Metallographic methods of qualitative and quantitative phase identification have long been known for their superior accuracy. In the current work phase fractions of martensite, bainite and austenite in a newly developed experimental steel, have been determined from image analysis of micrographs taken using dark field imaging and color etching. The interpretation of the results was supported by X-ray diffraction (XRD) and micro harness measurements of the different phases. It is shown that in the newly developed experimental steel the martensite phase undergoes a reverse transformation into austenite by reheating to a low temperature of 150°C, this is accurately determined from tint etching with 7%Na2S2O5, whereas other etching techniques might be deceiving as such interpretations are largely based on the morphology of the observed phase.


Dipl.-Ing. Peter Kirbiš
University of Maribor
Weitere Autoren/Referenten:
  • Dr. Mihael Bruncko
    University of Maribor
  • Dr. Tatjana Vecko Pirtovsek
    Metal Ravne d.o.o
  • Prof. Dr. Ivan Anžel
    University of Maribor


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Manuskript Version 1 Dies ist das manuscript zu dem abstract. (The topic of reverse transformation will be addressed in the presentation, as it couldn't be described accurately due to the limited length of the paper) 995 KB Download