Thermally activated martensite formation in ferrous alloys

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Magnetometry was applied to investigate the formation of α/α´martensite in 13ferrous alloys during immersion in boiling nitrogen and during re-heating to room temperature at controlled heating rates in the range 0.0083-0.83 K s-1. Data showsthat in 3 of the alloys, those that form {5 5 7}γ martensite, no martensite developsduring cooling. For all investigated alloys, irrespective of the type of martensiteforming, thermally activated martensite develops during heating. The activationenergy for thermally activated martensite formation is in the range 8‒27 kJ mol-1and increases with the fraction of interstitial solutes in the alloy
Original languageEnglish
JournalScripta Materialia
Pages (from-to)46-49
Publication statusPublished - 2017


  • Martensitic phase transformations
  • Steel
  • Kinetics

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