Vacancy type defects in oxide dispersion strengthened steels

V. Slugeň; J. Veterníková; J. Degmová; S. Kilpeläinen; V. Kršjak

doi:10.4028/www.scientific.net/MSF.733.264

Vacancy type defects in oxide dispersion strengthened steels

V. Slugeň^*, J. Veterníková, J. Degmová, S. Kilpeläinen, V. Kršjak

^*Corresponding author for this work

Department of Applied Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

This study was focused on commercial oxide-dispersion strengthened (ODS) steels - MA 956 (20%Cr), PM 2000 (19%Cr), ODM 751 (16%Cr) and MA 957 (14%Cr) developed for fuel cladding of Generation IV reactors. The ODS steels are investigated in order to compare their microstructure features. Vacancy defects were observed by Doppler broadening spectroscopy and positron annihilation lifetime spectroscopy. Residual stress proportional to all kinds of defects was investigated by magnetic Barkhausen noise measurement. The highest presence of vacancy defects was found in MA 956 and the lowest defect concentration in MA 957, although this steel contains the largest defects (six-vacancies together with dislocations or mono-vacancies). Other investigated steels contained probably three- or four-vacancy clusters. Further, the results from the positron techniques indicated a relation between the chromium content and the defect concentration. The magnetic Barkhausen noise results also showed that a peak position (describing a grain size) increased with the chromium content. However residual stress was independent of a chromium level.

Original language	English
Title of host publication	Positron and Positronium Chemistry X
Pages	264-269
Number of pages	6
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.733.264
Publication status	Published - 2013
MoE publication type	A4 Conference publication
Event	International Workshop on Positron and Positronium Chemistry - Smolenice Castle, Smolenice, Slovakia Duration: 5 Sept 2011 → 9 Sept 2011 Conference number: 10

Publication series

Name	Materials Science Forum
Volume	733
ISSN (Print)	02555476

Workshop

Workshop	International Workshop on Positron and Positronium Chemistry
Abbreviated title	PPC
Country/Territory	Slovakia
City	Smolenice
Period	05/09/2011 → 09/09/2011

Keywords

Doppler broadening spectroscopy
Magnetic barkhausen noise
ODS steels
Positron annihilation lifetime spectroscopy

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Cite this

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title = "Vacancy type defects in oxide dispersion strengthened steels",

abstract = "This study was focused on commercial oxide-dispersion strengthened (ODS) steels - MA 956 (20%Cr), PM 2000 (19%Cr), ODM 751 (16%Cr) and MA 957 (14%Cr) developed for fuel cladding of Generation IV reactors. The ODS steels are investigated in order to compare their microstructure features. Vacancy defects were observed by Doppler broadening spectroscopy and positron annihilation lifetime spectroscopy. Residual stress proportional to all kinds of defects was investigated by magnetic Barkhausen noise measurement. The highest presence of vacancy defects was found in MA 956 and the lowest defect concentration in MA 957, although this steel contains the largest defects (six-vacancies together with dislocations or mono-vacancies). Other investigated steels contained probably three- or four-vacancy clusters. Further, the results from the positron techniques indicated a relation between the chromium content and the defect concentration. The magnetic Barkhausen noise results also showed that a peak position (describing a grain size) increased with the chromium content. However residual stress was independent of a chromium level.",

keywords = "Doppler broadening spectroscopy, Magnetic barkhausen noise, ODS steels, Positron annihilation lifetime spectroscopy",

author = "V. Sluge{\v n} and J. Vetern{\'i}kov{\'a} and J. Degmov{\'a} and S. Kilpel{\"a}inen and V. Kr{\v s}jak",

year = "2013",

doi = "10.4028/www.scientific.net/MSF.733.264",

language = "English",

isbn = "9783037855188",

series = "Materials Science Forum",

pages = "264--269",

booktitle = "Positron and Positronium Chemistry X",

note = "International Workshop on Positron and Positronium Chemistry, PPC ; Conference date: 05-09-2011 Through 09-09-2011",

}

Slugeň, V, Veterníková, J, Degmová, J, Kilpeläinen, S & Kršjak, V 2013, Vacancy type defects in oxide dispersion strengthened steels. in Positron and Positronium Chemistry X. Materials Science Forum, vol. 733, pp. 264-269, International Workshop on Positron and Positronium Chemistry, Smolenice, Slovakia, 05/09/2011. https://doi.org/10.4028/www.scientific.net/MSF.733.264

TY - GEN

T1 - Vacancy type defects in oxide dispersion strengthened steels

AU - Slugeň, V.

AU - Veterníková, J.

AU - Degmová, J.

AU - Kilpeläinen, S.

AU - Kršjak, V.

N1 - Conference code: 10

PY - 2013

Y1 - 2013

N2 - This study was focused on commercial oxide-dispersion strengthened (ODS) steels - MA 956 (20%Cr), PM 2000 (19%Cr), ODM 751 (16%Cr) and MA 957 (14%Cr) developed for fuel cladding of Generation IV reactors. The ODS steels are investigated in order to compare their microstructure features. Vacancy defects were observed by Doppler broadening spectroscopy and positron annihilation lifetime spectroscopy. Residual stress proportional to all kinds of defects was investigated by magnetic Barkhausen noise measurement. The highest presence of vacancy defects was found in MA 956 and the lowest defect concentration in MA 957, although this steel contains the largest defects (six-vacancies together with dislocations or mono-vacancies). Other investigated steels contained probably three- or four-vacancy clusters. Further, the results from the positron techniques indicated a relation between the chromium content and the defect concentration. The magnetic Barkhausen noise results also showed that a peak position (describing a grain size) increased with the chromium content. However residual stress was independent of a chromium level.

AB - This study was focused on commercial oxide-dispersion strengthened (ODS) steels - MA 956 (20%Cr), PM 2000 (19%Cr), ODM 751 (16%Cr) and MA 957 (14%Cr) developed for fuel cladding of Generation IV reactors. The ODS steels are investigated in order to compare their microstructure features. Vacancy defects were observed by Doppler broadening spectroscopy and positron annihilation lifetime spectroscopy. Residual stress proportional to all kinds of defects was investigated by magnetic Barkhausen noise measurement. The highest presence of vacancy defects was found in MA 956 and the lowest defect concentration in MA 957, although this steel contains the largest defects (six-vacancies together with dislocations or mono-vacancies). Other investigated steels contained probably three- or four-vacancy clusters. Further, the results from the positron techniques indicated a relation between the chromium content and the defect concentration. The magnetic Barkhausen noise results also showed that a peak position (describing a grain size) increased with the chromium content. However residual stress was independent of a chromium level.

KW - Doppler broadening spectroscopy

KW - Magnetic barkhausen noise

KW - ODS steels

KW - Positron annihilation lifetime spectroscopy

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DO - 10.4028/www.scientific.net/MSF.733.264

M3 - Conference article in proceedings

AN - SCOPUS:84871076289

SN - 9783037855188

T3 - Materials Science Forum

SP - 264

EP - 269

BT - Positron and Positronium Chemistry X

T2 - International Workshop on Positron and Positronium Chemistry

Y2 - 5 September 2011 through 9 September 2011

ER -

Vacancy type defects in oxide dispersion strengthened steels

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Keywords

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