Influence of plastic strain on mechanically induced martensitic transformations

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    Abstract

    The effects of plastic strain on mechanically induced martensitic transformations are investigated. An austenitic metastable stainless steel is plastically deformed to varying amounts in a tensile tester at 120 C. This temperature is enough to suppress transformation during the deformation up to 20% of plastic strain. The resulting pre-strained material is then cooled to a lower temperature and the tensile test is continued while the martensite amount is measured via a magnetic sensor. Results show that for this alloy plastic strain does not promote the transformation. On the contrary, an increase in the critical stress at which transformation starts is observed with increasing pre-strain. Therefore, to model the transformation instead of the strain-induced transformation theory, a stress-driven approach is followed. Utilizing the Patel-Cohen and Wechsler-Lieberman-Read theories, a transformation criterion is established which is verified by Biaxial tests. For the evolution of martensite fraction, a meso-scale simulation is performed in which a homogeneous stress is applied to random crystal orientations and the favored crystals are allowed to transform. A good correspondence with the experiments is obtained.

    Original languageEnglish
    Title of host publicationInternational Conference on Martensitic Transformations (ICOMAT)
    EditorsG.B. Olson, D.S. Lieberman, A. Saxena
    PublisherWiley
    Pages614-620
    Number of pages7
    ISBN (Electronic)9781118803592
    ISBN (Print)9781118820438
    DOIs
    Publication statusPublished - 25 Jan 2010
    Event12th International Conference on Martensitic Transformations, ICOMAT-08 - Santa Fe, United States
    Duration: 29 Jun 20085 Jul 2008

    Conference

    Conference12th International Conference on Martensitic Transformations, ICOMAT-08
    CountryUnited States
    CitySanta Fe
    Period29/06/085/07/08

    Keywords

    • Plastic strain
    • Strain-induced
    • Stress-assisted
    • TRIP

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  • Cite this

    Perdahcioglu, E. S., Geijselaers, H. J. M., & Huétink, J. (2010). Influence of plastic strain on mechanically induced martensitic transformations. In G. B. Olson, D. S. Lieberman, & A. Saxena (Eds.), International Conference on Martensitic Transformations (ICOMAT) (pp. 614-620). Wiley. https://doi.org/10.1002/9781118803592.ch92