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Bainite morphology in two experimental Mo-Cr and Mo-Cr-V-Ti steels

Ławrynowicz Z., Skibicki A.

Advances in Materials Science

2014

Vol. 14, nr 3(41)

24--33

The paper presents an investigation of the bainite morphology in two experimental Mo-Cr and Mo-Cr-V-Ti steels using TEM, high speed dilatometry backed by thermodynamic analysis. The microstructure was investigated using metallography and TEM method. After austenitisation at 1200oC followed by bainitic reaction in upper and lower temperatures of isothetmal transformation the bainite was in the form of classical sheaves. The amont, distribution and morphology of retained austenite and bainitic ferrite depend on prior austenitisation and isothermal transformation temperatures within the bainitic range.

Bainite morphology in experimental FE-MO-CR-V-TI-C steel

Ławrynowicz Z.

Journal of Polish CIMAC

2012

Vol. 7, no 3

175-182

The development of bainitic transformation was studied using TEM, dilatometry and thermodynamic calculations, both from a fully austenitic microstructure (TA=1200oC) and from a microstructure containing a mixture of austenite and undissolved carbides (TA=1000oC). The amount, distribution and morphology of retained austenite, bainitic ferrite and precipitation of carbides strongly depends on both; prior austenitization and isothermal transformation temperatures within the bainitic range.