Critical factors governing the thermal stability of austenite in an ultra-fined grained Medium-Mn steel

The time-evolution of retained austenite at 650 °C is shown to be a fair indicator of the factors governing the austenite stability. The grain size contribution to austenite stability is evidenced and a martensite start temperature (M s ) law applicable to medium-Mn steels and including both the che...

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Bibliographic Details
Published in:Philosophical magazine letters 2017-04, Vol.97 (4), p.125-131
Main Authors: Arlazarov, A., Gouné, M., Bouaziz, O., Hazotte, A.
Format: Article
Language:English
Subjects:
Austenite
Austenitic stainless steel
Chemical Sciences
Grain size
Indicators
Manganese steels
Martensite
Material chemistry
Medium-Mn steels
Retained austenite
Size effects
Stability
Temperature
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Summary:The time-evolution of retained austenite at 650 °C is shown to be a fair indicator of the factors governing the austenite stability. The grain size contribution to austenite stability is evidenced and a martensite start temperature (M s ) law applicable to medium-Mn steels and including both the chemical and size effects is determined.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500839.2017.1290293