Martensite Formation from Reverted Austenite at Sub-zero Celsius Temperature

Frank Nießen*, Matteo Villa, Marcel A. J. Somers

*Corresponding author for this work

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Inter-critical annealing of soft martensitic stainless steel leads to formation of fine-grained reverted austenite, which is stabilized by partitioning of Ni. Generally it is reported that reverted austenite is not affected by immersion in cryogenic liquids, such as boiling N2 and He. The present data show that reverted austenite that is apparently stable at boiling nitrogen temperature does transform isothermally to martensite during holding at 195 K. The results are explained in terms of thermally activated martensite formation.
Original languageEnglish
JournalMetallurgical and Materials Transactions A
Issue number11
Pages (from-to)5241-5245
Publication statusPublished - 2018

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