19972020

Research output per year

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Personal profile

Artistic and research interests

Research topics include materials degradation and non-destructive testing. In materials degradation, focus is on energy materials (nuclear, in particular), fatigue, thermal fatigue and residual stresses. Recent research focuses on measuring and understanding weld residual stresses in complex nuclear welds, dissimilar metal welds and weld repairs and their possible relaxation during in-service use.

In non-destructive testing, the research focus is on reliability assessment of various NDT methods, probability of detection determination and advanced NDT data processing.

Education/Academic qualification

Doctor of Science (Technology)

Master of Science (Technology)

External positions

Chairman of the Board

15 Jan 2017 → …

Managing Director, Trueflaw Ltd.

1 Aug 2001 → …

Keywords

  • Materials
  • Residual stresses
  • Probability of detection
  • NDT
  • Fatigue

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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., 24 Mar 2020, In : Metals. 10, 3, 17 p., 421.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File
  • 10 Downloads (Pure)
  • Comparison of â Versus a and Hit/Miss POD-Estimation Methods : A European Viewpoint

    Virkkunen, I., Koskinen, T., Papula, S., Sarikka, T. & Hänninen, H., 1 Dec 2019, In : Journal of Nondestructive Evaluation. 38, 4, 13 p., 89.

    Research output: Contribution to journalArticleScientificpeer-review

    Open Access
    File
    53 Downloads (Pure)

    Selective laser melting of duplex stainless Steel 2205 : Effect of post-processing heat treatment on microstructure, mechanical properties, and corrosion resistance

    Papula, S., Song, M., Pateras, A., Chen, X. B., Brandt, M., Easton, M., Yagodzinskyy, Y., Virkkunen, I. & Hänninen, H., 1 Aug 2019, In : Materials. 12, 15, 2468.

    Research output: Contribution to journalArticleScientificpeer-review

    Open Access
    File
  • 4 Citations (Scopus)
    85 Downloads (Pure)

    The effect of subsurface crack opening on the stress intensity factor under cyclic thermal loads

    Kuutti, J. & Virkkunen, I., 1 Sep 2019, In : Engineering Fracture Mechanics. 218, 12 p., 106600.

    Research output: Contribution to journalArticleScientificpeer-review

  • Projects

    HYDRO-REAL

    Virkkunen, I.

    28/05/202031/12/2024

    Project: EU: Framework programmes funding

    FEVAS: Fatigue and evolving assessment of fracture

    Virkkunen, I.

    01/02/202031/01/2021

    Project: Other external funding: Other government funding

    RACOON: Non-destructive examination of NPP primary circuit components, machine learning and reliability of inspection

    Virkkunen, I. & Siljama, S.

    01/02/202031/01/2021

    Project: Other external funding: Other government funding

    SAFIR_NoCo_2020 (VYR)

    Virkkunen, I.

    01/01/202031/12/2020

    Project: Other external funding: Other government funding

    Activities

    • 1 Conference presentation
    • 1 Visit abroad

    Virtual flaws to estimate POD

    Iikka Virkkunen (Speaker), Suvi Papula (Contributor), Tuomas Koskinen (Contributor), Tarja Jäppinen (Contributor)
    4 Apr 2017

    Activity: Talk or presentation typesConference presentation

    Foreign Organisation

    Mikko Virkkunen (Visiting researcher)
    6 Jul 2016

    Activity: Visiting an external institution typesVisit abroad

    Press / Media

    EMBARGO AI now looks for cracks in metro axles in Helsinki

    Iikka Virkkunen

    01/06/2020

    1 item of Media coverage

    Press/Media: Media appearance

    Trueflaw takes a crack at world dominance

    Iikka Virkkunen

    26/11/2019

    1 item of Media coverage

    Press/Media: Media appearance

    AI Now Looks for Cracks in Metro Axles in Helsinki

    Iikka Virkkunen

    22/10/2019

    13 items of Media coverage

    Press/Media: Media appearance

    *** Tiedote/Trueflaw Oy: AI now looks for cracks in metro axles in Helsinki ***

    Iikka Virkkunen

    21/10/2019

    1 item of Media coverage

    Press/Media: Media appearance