Isothermal martensite formation in a magnetically ordered austenite phase of an Fe-32%Ni-0.4%Cr alloy


Akturk S., Guner M., Aktas H.

Journal of Alloys and Compounds, vol.387, no.1-2, pp.279-281, 2005 (Peer-Reviewed Journal) identifier

  • Publication Type: Article / Article
  • Volume: 387 Issue: 1-2
  • Publication Date: 2005
  • Doi Number: 10.1016/j.jallcom.2004.06.042
  • Journal Name: Journal of Alloys and Compounds
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.279-281
  • Keywords: Ferromagnetic austenite, Isothermal martensite, Mössbauer spectroscopy, Scanning electron microscopy

Abstract

In this study, the isothermal martensitic transformation has been examined in an austenitic Fe-Ni-Cr alloy. The magnetic properties of the austenite phase are investigated with Mössbauer spectroscopy and the results showed that the Fe-32%Ni-0.4%Cr alloy in the austenite state is magnetically ordered. In the austenite state, the six peaks of the ferromagnetic phase of Fe-32%Ni-0.4%Cr alloy were observed in the Mössbauer spectrum. The effective hyperfine field of the ferromagnetic (or antiferromagnetic) austenite phase was determined as 31.9 T and the isomer shift value was determined as -0.19 mm/s. We also investigated the austenite-martensite phase transformation observed upon cooling in the Fe-Ni-Cr alloy by scanning electron microscopy (SEM). © 2004 Published by Elsevier B. V.