Topic
Bainite
About: Bainite is a research topic. Over the lifetime, 9520 publications have been published within this topic receiving 145305 citations.
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TL;DR: In this paper, the authors studied the transformation characteristics of thin plate martensite in Fe-NiC alloys and showed that the interface is essentially mobile and the transformation is somewhat reversible.
102 citations
TL;DR: In this paper, the formation mechanisms of white layers (WLs) induced by machining of through-hardened (martensitic and bainitic) AISI 52100 steel were investigated using transmission electron microscopy.
102 citations
TL;DR: In this paper, a 0.79 C-1.58 Co (wt.%) steel was isothermally heat treated at 200 and 350°C for one day to form a nanoscale bainitic microstructure consisting of nanobainitic ferrite laths with high dislocation density.
102 citations
TL;DR: In this paper, the deformation behavior of the two phases of three plain carbon dual-phase steels after various treatments has been studied using a scanning electron microscope equipped with a tensile straining stage.
Abstract: The deformation behaviour of the two phases of three plain carbon dual–phase steels after various treatments has been studied using a scanning electron microscope equipped with a tensile straining stage. The distribution of strains between the ferrite and martensite phases, as well as among the different grains of each phase, was observed to be inhomogeneous. The martensite/ferrite strain ratio, which defines the degree of uniformity of straining between the phases, depends on the microstructural parameters of the steels: it increases with increasing volume fraction of martensite, but decreases as the carbon content of the martensite increases. Tempering at various temperatures causes a decrease in the martensite/ferrite microhardness ratio and hence causes an increase in the strain ratio. The macroscopic strain of the specimen at which the martensite begins to deform was also found to be dependent on the microstructural parameters. Regions of applicability of the existing theories of the strength...
101 citations
TL;DR: In this paper, the effects of hot deformation and subsequent austempering on the mechanical properties of hot rolled Si-Mn TRIP steels were investigated by using a laboratory hot rolling mill, in which three different kinds of finish rolling reduction, temperatures and austemperings with various isothermal holding duration were applied.
Abstract: In the present paper, effects of hot deformation and subsequent austempering on the mechanical properties of hot rolled Si–Mn TRIP steels were investigated. Thermomechanical controlled processing (TMCP) was conducted by using a laboratory hot rolling mill, in which three different kinds of finish rolling reduction, temperatures and austemperings with various isothermal holding duration were applied. The results have shown that polygonal ferrite, granular bainite and larger amount of stabilized retained austenite can be obtained by controlled rolling processes. Ultimate tensile strength, yield strength and total elongation increase with increasing the amount of deformation and decreasing finish rolling temperature due to the stabilization of retained austenite. Tensile strength and total elongation can reach the maximum values (791 MPa and 36%, respectively), and isothermal holding 20 min at 400°C after hot deformation has been proved to be the optimum treatment.
101 citations