Thermal Stability of Austempered Ductile Iron Evaluated in a Temperature Range of 20-300K

Authors

  • Dawid MYSZKA Warsaw University of Technology, Institute of Manufacturing Technology, ul. Narbutta 85, Warsaw, Poland
  • Maciej KOWALCZYK Warsaw University of Technology, Faculty of Materials Engineering, ul. Wołoska 141, Warsaw, Poland,
  • Maciej SPYCHALSKI Warsaw University of Technology, Faculty of Materials Engineering, ul. Wołoska 141, Warsaw, Poland,
  • Andrzej WIECZOREK Silesian University of Technology, Faculty of Mining and Geology, ul. Akademicka 2, 44-100 Gliwice, Poland

DOI:

https://doi.org/10.5755/j01.ms.22.1.7505

Keywords:

austempered ductile iron, cryogenic treatment, thermal stability, martensitic transformation

Abstract

The aim of this article was to determine through changes in magnetic properties the stability of the austempered ductile iron (ADI) microstructure during temperature changes in a range of 20 – 300 K. The measurements were taken in a vibrating sample magnetometer (VSM) using Fe27Ni2TiMoAlNb austenitic stainless steel and four types of austempered ductile iron obtained under various heat treatment conditions. The plotted curves showing changes in the magnetisation degree as a function of temperature had a number of characteristic points illustrating changes taking place in the microstructure. For each of the materials examined, the martensite start temperature Ms and the temperature range within which the martensitic transformation takes place were identified.

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Published

2016-01-21

Issue

Vol. 22 No. 1 (2016)

Section

TESTING AND ANALYSIS OF MATERIALS

License

 

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