Impact wear and mechanical behavior of steels at subzero temperatures

Kati Valtonen (Corresponding Author), V. Ratia, K.R. Ramakrishnan, Marian Apostol, J. Terva, Veli-Tapani Kuokkala

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    In this study, the deformation behavior of three steels was studied at Arctic temperatures by controlled single and multiple oblique angle impacts. The results were compared with the mechanical properties of the steels determined at the corresponding temperatures. At subzero temperatures, the hardness and strength of the studied steels increased and their ability to deform plastically steadily decreased. In the martensitic steels, adiabatic shear bands were observed to form during the impacts at subzero temperatures, indicating that the deformation ability of the steels was critically impaired. At −60 °C, the adiabatic shear bands commonly acted as initiation sites for subsurface cracks. Moreover, the surface characterization of the test samples revealed formation of cracks and wear particles, which was connected to the opening of grain boundaries and martensite laths at low temperatures. Finite Element Modeling was also used to obtain more information about the impact event.
    Original languageEnglish
    Pages (from-to)476-493
    JournalTribology International
    Volume129
    DOIs
    Publication statusPublished - 2019
    MoE publication typeA1 Journal article-refereed

    Keywords

    • impact
    • Wear
    • low temperature
    • Steel

    Fingerprint Dive into the research topics of 'Impact wear and mechanical behavior of steels at subzero temperatures'. Together they form a unique fingerprint.

    Cite this