Effects of adiabatic heating estimated from tensile tests with continuous heating

N. Vazquez Fernandez, M. Isakov, M. Hokka, V. T. Kuokkala

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

    1 Citation (Scopus)

    Abstract

    The mechanical behavior of metastable austenitic stainless steels is strongly influenced by the strain induced phase transformation of austenite into martensite. The phase transformation rate is significantly affected by the strain rate and by the adiabatic heating at higher strain rates. Uncoupling of the effects of strain rate and adiabatic heating can lead to a better understanding of the strain-induced martensitic transformation and allow more accurate material modeling. This paper presents a preliminary analysis of the effects of adiabatic heating during a tensile test. The adiabatic heating as a function of strain was calculated from the stress-strain curves obtained in adiabatic conditions. Then the tensile tests were carried out at a lower strain rate while continuously heating the specimen at the same rate as obtained in the adiabatic conditions. With this method, the thermal conditions of the adiabatic tests were reproduced in the low rate conditions, which would normally be isothermal without the external heating. The martensite fraction was evaluated using the magnetic balance method. In this paper, we present a detailed description of the experimental procedure and discuss the observed changes in the mechanical behavior and microstructure of the studied steel.

    Original languageEnglish
    Title of host publicationDynamic Behavior of Materials - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics
    Pages1-7
    Number of pages7
    Volume1
    DOIs
    Publication statusPublished - 2018
    Publication typeA4 Article in conference proceedings
    EventAnnual Conference and Exposition on Experimental and Applied Mechanics -
    Duration: 1 Jan 2000 → …

    Publication series

    NameConference Proceedings of the Society for Experimental Mechanics
    ISSN (Print)2191-5644

    Conference

    ConferenceAnnual Conference and Exposition on Experimental and Applied Mechanics
    Period1/01/00 → …

    Keywords

    • Adiabatic heating
    • Magnetic balance method
    • Martensite transformation
    • Metastable austenite
    • Stainless steel

    Publication forum classification

    • Publication forum level 0

    ASJC Scopus subject areas

    • Engineering(all)
    • Computational Mechanics
    • Mechanical Engineering

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