Magnetic investigation of the effect of α′-martensite on the properties of austenitic stainless steel

István Mészáros, János Prohászka

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

In this paper some phase transformations of the AISI 304 austenitic stainless steel are studied. The appearance of the strain induced α′-martensite phase due to cold rolling and elongation was investigated by different magnetic measurement techniques. It was demonstrated that the type of deformation and the rate of deformation strongly influence the amount of α′-martensite phase. It is supposed that the additional stress due to the specific volume change of γ→α′ transformation can improve the plastic deformation of the neighbouring austenite grains in the highly deformed range which has increasing effect on the amount of α′-martensite phase. The reverse transformation of the α′-phase back to γ-phase due to heat treatment is also studied. It was proved that the magnetic and hardness recovery processes started at different temperatures. The paper demonstrates the application possibility of magnetic measurements in case of the investigated metallurgical problem.

Original languageEnglish
Pages (from-to)162-168
Number of pages7
JournalJournal of Materials Processing Technology
Volume161
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - Apr 10 2005

Keywords

  • Austenitic stainless steel
  • Magnetic barkhausen noise
  • Micromagnetic measurements
  • Phase transformation
  • Strain induced martensite

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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