In-situ investigation of strain-induced martensitic transformation kinetics in an austenitic stainless steel by inductive measurements

C. Alonso de Celada Casero, Harm Kooiker, Manso Groen, Jan Post, David San Martin

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    Abstract

    An inductive sensor developed by Philips ATC has been used to study in-situ the austenite (γ) to martensite (α′) phase transformation kinetics during tensile testing in an AISI 301 austenitic stainless steel. A correlation between the sensor output signal and the volume fraction of α′-martensite has been found by comparing the results to the ex-situ characterization by magnetization measurements, light optical microscopy, and X-ray diffraction. The sensor has allowed for the observation of the stepwise transformation behavior, a not-well-understood phenomena that takes place in large regions of the bulk material and that so far had only been observed by synchrotron X-ray diffraction.

    Original languageEnglish
    Article number271
    Number of pages15
    JournalMetals
    Volume7
    Issue number7
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Inductive measurements
    • Metastable austenite
    • Stainless steel
    • Strain-induced martensite
    • Transformation kinetics

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