This investigation explores the influence of austenitisation heat treatment and thus, prior austenite grain size (PAGS), on kinetics bainitic transformation, using as A case study two high-carbon, high-silicon, steels isothermally transformed (TIso = 250, 300, 350 °C), after being austenised at different temperatures (γTγ 925–1125 °C). methodology, based three defining dilatometric parameters e...

Herein, the diffusion and distribution of hydrogen (H) atoms in ferrite bainite contained an X80 pipeline steel is studied by both scanning Kelvin probe force microscopy finite-element modeling. The effect metallurgical microphases on H-atom accumulation analyzed. It showed results that H-charging elevates electrochemical dissolution activity steel, as indicated increased Volta potential thus d...

Retained austenite is a key feature used to realize the transformation-induced plasticity in bainitic high strength steels. In this study, authors focused on formation of metastable Fe-0.61C-1.9Si-0.98Mn (mass%) during isothermal heating processes using situ neutron diffraction techniques. Quantitative discussion carbon partitioning enabled by applying an phase fraction analysis considering cry...

The effect of austenite deformation on carbon partitioning and transformation to athermal isothermal martensite, bainite during quenching (QP) is described for three steel compositions: Fe-0.3C-0.6Si-1.1Al, Fe-0.3C-1.0Si Fe-0.3C-0.5Si-0.5Al. Microstructures were characterized using SEM-EBSD, TEM XRD. Austenite decomposition kinetics was investigated dilatometry. Deformation close the no-recryst...

Three-dimensional microstructures of bainitic ferrites and prior austenite grains (PAGs) were observed in the initial stage upper bainite transformation by using a serial sectioning technique orientation analysis electron back scattering diffraction (EBSD). The formation site was quantitatively evaluated three-dimensional observation. It revealed that mainly form at planes rather than edges gra...