Martensite transformation of sub-micron retained austenite in ultra-fine grained manganese transformation-induced plasticity steel
2012; De Gruyter; Volume: 104; Issue: 5 Linguagem: Inglês
10.3139/146.110882
ISSN2195-8556
AutoresSeok-Jae Lee, Seawoong Lee, Bruno C. De Cooman,
Tópico(s)Metallurgy and Material Forming
ResumoAbstract The influence of the chemical composition and the grain size of retained austenite in an ultra-fine grained medium manganese steel on the martensite transformation kinetics was investigated by means of dilatometry. A modified Koistinen–Marburger type exponential function was developed for the martensite transformation kinetics, which includes the influence of the size and the composition of the austenite. Whereas the ultra-fine grained retained austenite had a remarkably low M s temperature, the kinetics of its transformation to martensite was accelerated.
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