Positron annihilation measurements performed on oxide-dispersion strengthened steels

J. Veternikova*, S. Kilpeläinen, M. Skarba, V. Slugen, J. Degmova, V. Sabelova, S. Sojak

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

This paper is focused on investigation of oxide-dispersion strengthened steels in a basic state (before an experimental treatment) by two positron annihilation techniques - positron annihilation lifetime spectroscopy and Doppler broadening spectroscopy. Three high chromium commercial steels - MA 956, MA 957 and PM 2000 were measured in order to identify and quantify defects in samples as well as to demonstrate defect depth profile in subsurface layers up to 1.6μm. Results indicate presence of di-vacancies in PM 2000, three-vacancies in MA 956 and six-vacancies together with dislocations in MA 957. Positron techniques were supplemented by scanning electron microscopy, which demonstrated also presence of larger defects as pores and different density of precipitates.

Original languageEnglish
Title of host publicationPositron and Positronium Chemistry X
Pages278-281
Number of pages4
DOIs
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
EventInternational Workshop on Positron and Positronium Chemistry - Smolenice Castle, Smolenice, Slovakia
Duration: 5 Sep 20119 Sep 2011
Conference number: 10

Publication series

NameMaterials Science Forum
Volume733
ISSN (Print)02555476

Conference

ConferenceInternational Workshop on Positron and Positronium Chemistry
Abbreviated titlePPC
CountrySlovakia
CitySmolenice
Period05/09/201109/09/2011

Keywords

  • Oxide-dispersion-strengthened steels
  • Positron annihilation spectroscopy
  • Scanning electron microscopy

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