The current study reports in situ TEM observations of the growth bainitic ferrite an Fe-0.3C-3Mn-1.5Si-0.15Mo steel held isothermally at 300 °C with a higher spatio-temporal resolution than previous studies. Significant variations were found lengthening rate, highest being excess 30,000 nm.s−1 while more common rates 10–1000 provided quality observations. Both sheaves visible sub units and indi...

The effect of deformation temperature on the mechanical properties 1-GPa-grade TRIP steels with different retained austenite (?R) morphologies was studied. dependence deformation-induced martensitic transformation behavior also investigated. uniform elongation below room relatively large in needle-like ?R steel, whereas tensile strength at each almost same as it independent morphology. better s...

With careful design, mixed microstructures consisting of fine plates of upper bainitic ferrite separated by thin films of stable retained austenite have exhibited impressive combinations of strength and toughness in highsilicon bainitic steels. The silicon suppresses the precipitation of brittle cementite leading to an improvement in toughness. The essential principles governing the optimisatio...

structural steels with very high strength levels are often referred to as ultrahigh-strength steels (uhss). the usage of uhss has been extensively studied in aerospace industries and offshore platforms. in this study, medium carbon low alloy steel (ams6305) was thermomechanicaly treated to obtain an ultra-high strength bainitic steel for aircraft engine compressor disk. a novel themomechanical ...

Displacive stress and strain induced transformations are those that occur when the formation of martensite or bainitic ferrite is promoted by application strain. These have been shown to be one mechanisms which mechanical properties a microstructure can improved, as they lead better ductility strength transformation plasticity effect. This review aims summarize fundamental knowledge about them,...

In situ multiaxial loading during neutron diffraction tests were undertaken on a low-alloyed Quenched and Partitioning (Q&P) Transformation Induced Plasticity (TRIP) Bainitic Ferrite (TBF) steel with dispersed austenite particles. The effect of stress triaxiality the evolution deformation-induced martensite is investigated under uniaxial- equibiaxial-tension as well tension/compression ratio −1...

The addition of high-content alloying elements and the unbefitting process make carbide-free bainite steel difficult in industrial production. Thus, we adopted a dynamic continuous cooling for developing high-strength cold-rolled low-alloy bainitic steels this study. influence rates on microstructure mechanical properties was investigated by dilatometry, scanning electron microscopy (SEM), X-ra...