Application of thermo-calc TCFE7 to high-alloyed mottled cast iron

Armin Paar, Leonel Elizondo, Michael Brandner, Thomas Trickl, Bernhard Sonderegger, Coline Beal, Christof Sommitsch

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The thermodynamic modeling of alloy systems consisting of stable and metastable phases e.g. high-alloyed mottled cast iron can be problematic. Thermodynamic databases are rather well-developed for low, medium and high alloyed steels (e.g. HSS) but the application of those databases is not yet very common for high-alloyed (mottled) cast irons. The Thermo-Calc software together with the TCFE7 database is used to calculate isopleth and property diagrams, using the CALPHAD method. Additionally Scheil-Gulliver calculations are performed to simulate the effects of microsegregation during solidification. The results from the thermodynamic calculations are compared with measurements on own samples and with literature values. Those measurements include quantitative light-optical analysis, SEM with BSE detector, EDX measurements for the distribution of the alloying elements as well as XRD and DSC measurements. The investigations show the possibilities which are offered by thermodynamic calculations for highalloyed mottled cast iron as well as the limitations and the compromises which have to be taken into account when calculating stable and metastable phases existing next to each other.

Original languageEnglish
Pages (from-to)1431-1436
Number of pages6
JournalMaterials Science Forum
Volume879
DOIs
Publication statusPublished - 2016
EventTHERMEC - Stadthalle Graz, Graz, Austria
Duration: 29 May 20163 Jun 2016
https://www.tugraz.at/events/thermec-2016/home/

Keywords

  • Mottled cast iron
  • TCFE7
  • Thermo-Calc
  • Thermodynamic modeling

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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