Complex study of eutectoidal phase transformation of 2507-type super-duplex stainless steel

I. Mészáros, Bálint Bögre

Research output: Contribution to journalArticle

Abstract

The aim of this work was to study expansively the process of the eutectoidal phase transformation of 2507-type super-duplex stainless steel. Three sample sets were prepared. The first sample set was made to investigate the effect of the previous cold rolling and heat treatment for the eutectoidal phase transformation. Samples were cold rolled at seven different rolling reductions which was followed by heat treatment at five different temperatures. The second sample set was prepared to determine the activation energy of the eutectoidal decomposition process using the Arrhenius equation. Samples were cold rolled at seven different rolling reductions and were heat treated at the same temperature during eight different terms. A third sample set was made to study how another plastic-forming technology, beside the cold rolling, can influence the eutectoidal decomposition. Samples were elongated by single axis tensile stress and were heat treated at the same temperature. The results of the first and the third sample sets were compared. The rest δ-ferrite contents were calculated using the results of AC and DC magnetometer measurements. DC magnetometer was used as a feritscope device in this work. Light microscope and electron back scattering diffraction (EBSD) images demonstrated the process of the eutectoidal decomposition. The thermoelectric power and the hardness of the samples were measured. The results of the thermoelectric power measurement were compared with the results of the δ-ferrite content measurement. The accurate value of the coercive field was determined by a Foerster-type DC coercimeter device.

Original languageEnglish
Article number2205
JournalMaterials
Volume12
Issue number13
DOIs
Publication statusPublished - Jul 1 2019

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Stainless Steel
Stainless steel
Phase transitions
Cold rolling
Thermoelectric power
Magnetometers
Decomposition
Ferrite
Heat treatment
Plastics forming
Tensile stress
Temperature
Microscopes
Activation energy
Diffraction
Hardness
Scattering
Electrons
Hot Temperature

Keywords

  • Activation energy
  • Cold rolling
  • Duplex stainless steel
  • EBSD
  • Eutectoidal decomposition
  • Heat treatment
  • Magnetic testing
  • Thermoelectric power

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Complex study of eutectoidal phase transformation of 2507-type super-duplex stainless steel. / Mészáros, I.; Bögre, Bálint.

In: Materials, Vol. 12, No. 13, 2205, 01.07.2019.

Research output: Contribution to journalArticle

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