Ulla Ehrnstén

Principle Scientist

  • Phone+358405354057
1989 …2020

Research output per year

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Personal profile

Research interests

I am a Principal Scientist at VTT with more than 35 years of experience in nuclear materials. My main expertiese is behaviour of materials in nuclear environments and failure analyses. I am familiar with SEM, EDS, hardness, optical microscopy and other analyses techniques.

Nuclear materials, failure analysis, microstructure, ageing, aging

Ydinvoimalaitosmateriaalit, vauriotutkimus, mikrorakenne, SEM, EDS, vanheneminen

Education/Academic qualification

Manufacturing and processing, Master, Helsinki University of Technology

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Research Output

Effect of thermal ageing at 400 °C on the microstructure of ferrite-austenite interface of nickel-base alloy narrow-gap dissimilar metal weld

Ahonen, M., Mouginot, R., Sarikka, T., Lindqvist, S., Que, Z., Ehrnstén, U., Virkkunen, I. & Hänninen, H., Mar 2020, In : Metals. 10, 3, 421.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
  • Determination of T0 with Miniature C(T) Specimens for a High-Ni Weld Metal used in a Boiling Water Reactor Pressure Vessel

    Sirkiä, L., Lydman, J., Ehrnstén, U. & Lindqvist, S., 2019, Baltica XI: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, 10 p.

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

    Open Access
    File
    13 Downloads (Pure)

    Electrochemical investigation of in-service thermal aging in two CF8M cast stainless steels

    Huotilainen, C., Ivanchenko, M., Efsing, P. & Ehrnsten, U., Jul 2019, In : Journal of Nuclear Materials. 520, p. 34-40 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  • 1 Citation (Scopus)

    Microstructural characterization of thermally aged Barsebäck RPV head weld metal

    Lydman, J., Hytönen, N., Que, Z., Ehrnstén, U. & Nevasmaa, P., 11 Aug 2019, VTT Technical Research Centre of Finland. 36 p. (VTT Research Report; No. VTT-R-01003-19).

    Research output: Book/ReportReport