Deformation and microstructure of neutron irradiated stainless steels with different stacking fault energy

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Abstract

In order to assess the effect of the stacking fault energy (SFE) on the neutron irradiation induced defects accumulation behaviour of stainless steels, it is important to detection and identification of the small defects in the each of the three irradiated alloys with different SFE by the transmission electron microscopy (TEM). The purpose of this paper is to illustrate the optimum experimental conditions necessary for obtaining the strain contrast images from the various types of defects, and then determine their type and nature. The results show that, only in the LSFE and Ref SFE alloys, the stacking fault tetrahedron (SFTs) are observed. The nature of the SFTs is vacancy. The dislocation loops are Frank and perfect loops including both vacancies and interstitials in the 3 model alloys. Most of the dislocation loops are vacancy type, and with increasing the SFE, the amount of the interstitial loops increases

Details

Original languageEnglish
Pages (from-to)329-333
JournalJournal of Nuclear Materials
Volume385
Issue number2
DOIs
Publication statusPublished - Mar 2009

Keywords

  • Stainless steels, neutron irradiation, stacking fault energy, transmission electron microscopy, deformation mechanism

ID: 182183