Radiation resistance of advanced ferritic-martensitic steel HCM12A

T. R. Allen, L. Tan, J. D. Tucker, J. Gan, G. Gupta, G. S. Was, S. Shutthanandan, S. Thevuthasan

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)


    HCMI2A is an advanced 12 Cr ferritic-martensitic steel designed for higher temperature operation than could be achieved using earlier generation steels such as HT9. HCMI2A is one of the advanced alloys under consideration for application in core components in Generation IV nuclear energy systems, and is of particular interest to the supercritical water reactor, sodium fast reactor, and lead fast reactor designs. The radiation resistance of HCMI2A has not previously been studied. This work provides information on the hardening and microstructural changes in HCMI2A after irradiation using 2.0 MeV protons at 400°C to 10 dpa and 5 MeV Ni-ions at 500°C to 50 dpa. Following irradiation, changes in hardness were measured using Vickers hardness indentation, changes in microstructure and phase stability were studied using transmission electron microscopy, and changes in microchemistry were measured using scanning Auger microscopy. The hardness increases by roughly 70 % and saturates by roughly 5 dpa. The changes to the microstructure contributing to this hardness increase are primarily due to the formation of precipitate phases, with some contribution from changes in dislocation density. Chromium is enriched at grain boundaries prior to irradiation, likely due to grain boundary carbides, and increases further during the irradiation.

    Original languageEnglish
    Title of host publicationEffects of Radiation on Materials
    Subtitle of host publication22nd Symposium
    PublisherAmerican Society for Testing and Materials
    Number of pages13
    ISBN (Print)0803134010, 9780803134010
    Publication statusPublished - 1 Jan 2006
    Event22nd Symposium on Effects of Radiation on Materials - Boston, MA, United States
    Duration: 8 Jun 200410 Jun 2004

    Publication series

    NameASTM Special Technical Publication
    Volume1475 STP
    ISSN (Print)0066-0558


    Conference22nd Symposium on Effects of Radiation on Materials
    CountryUnited States
    CityBoston, MA



    • Ferritic-martensitic steel
    • Microstructure
    • Radiation
    • Segregation

    ASJC Scopus subject areas

    • Materials Science(all)

    Cite this

    Allen, T. R., Tan, L., Tucker, J. D., Gan, J., Gupta, G., Was, G. S., Shutthanandan, S., & Thevuthasan, S. (2006). Radiation resistance of advanced ferritic-martensitic steel HCM12A. In Effects of Radiation on Materials: 22nd Symposium (pp. 135-147). (ASTM Special Technical Publication; Vol. 1475 STP). American Society for Testing and Materials.