Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Microstructural study of Alloy 690 base metal and HAZ from mockup components – Influence of Ti(C,N) banding
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).ORCID iD: 0000-0002-2641-7838
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).ORCID iD: 0000-0003-1498-5691
2015 (English)In: Fontevraud 8 - Contribution of Materials Investigations and Operating Experience to LWRs’ Safety, Performance and Reliability, International Atomic Energy Agency, 2015, Vol. 46Conference paper, Published paper (Refereed)
Abstract [en]

The Alloy 690 base metal and heat affected zones (HAZs) of three component mockups have been studied using light optical microscopy and scanning electron microscopy. All mockups were manufactured as part of the production of replacement components using commercial heats. Welding and post weld heat treatments were performed in the same way as for components in field in order to obtain microstructures representative to the ones in operating plants.

All three Alloy 690 base metals exhibited Ti(C,N) banding, but to a different extent. In all cases, the bands extended through the material’s longitudinal direction. In two of these materials the Ti(C,N) bands were correlated with M23C6 carbide coarsening, fine grain banding and reduced grain boundary tortuosity in the longitudinal direction.

Full carbide dissolution was observed near the fusion line. The coarser carbides in the banded regions were overall less affected, but were also fully dissolved when close enough to the fusion line. The region affected by carbide dissolution spanned roughly 300‑1000 μm wide depending on mockup. The Ti(C,N) precipitates however appeared unaffected. The lack of carbides near the fusion line, where the weld induced strains typically are highest, suggest that inducing cold work after a solution anneal may produce a material more representative of the HAZ than cold working the material in the thermally treated state.

Place, publisher, year, edition, pages
International Atomic Energy Agency, 2015. Vol. 46
Series
INIS-FR, 15-0359
Keyword [en]
Alloy 690, heat affected zone, microstructure, banding, carbides
National Category
Materials Engineering
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-164099OAI: oai:DiVA.org:kth-164099DiVA: diva2:803809
Conference
Fontevraud 8 Fontevraud 8 - Contribution of Materials Investigations and Operating Experience to LWRs’ Safety, Performance and Reliability, 15-18 September, 2014
Note

QC 20170303

Available from: 2015-04-13 Created: 2015-04-13 Last updated: 2017-03-03Bibliographically approved

Open Access in DiVA

No full text

Other links

https://inis.iaea.org/search/search.aspx?orig_q=RN:46087913

Authority records BETA

Efsing, Pål

Search in DiVA

By author/editor
Shen, RickardEfsing, Pål
By organisation
Solid Mechanics (Dept.)
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 83 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf