this study was conducted in order to investigate the influence of plastic deformation on the transformation of retained austenite in a trip steel with a high content of al and a low content of si. to the aim, appropriate treatments were used to produce the starting material (trip steel). the microstructure of the obtained steel was composed of bainite and phases including ferrite and retained a...

Stress–strain behavior of a low carbon alloy multiphase steel with ferrite, tempered bainite, and retained austenite was studied at different cryogenic temperatures. Results indicated that both strength ductility were enhanced decreasing tensile testing temperature. The enhancement attributed to the decreased mechanical stability temperature, resulting in sufficient transformation induced plast...

Local hardness increasing on the surface of the power plant rotor may result in severe damages. One major solution for rapid repairing of the rotors is the adaptive tempering heat treatment. For this purpose, after identification of the damaged rotor, initial investigations and tests (such as visual inspection, chemical analysis, nondestructive hardness measurements and replica or on-site metal...

The selection of crystallographic variants in bainitic microstructures is a deeply studied topic which can be attributed to several reasons. In the cases where prior austenite textured, stressed or plastically deformed, final ferrite texture and dilatometry signal may change, being anisotropic. Although causality between variant variation dilatometric has been previously assumed, it not thoroug...

In this work, different heat treatments were performed in order to study two bainite morphologies, granular and lath-like, obtained at cooling rates a low carbon microalloyed steel. For that purpose, advanced crystallographic characterization quantitative metallography using SEM, EBSD TEM carried out. The evolution of the volume percentage, size, aspect ratio, retained austenite percentage crys...

Derived by means of EBSD, statistics crystal curvature in quenched low carbon steel is analyzed with allowance for its transformation kinetics terms dilatometry data. Based on spectra sensitive to the distribution dislocation density, fractions martensite and bainite are quantified at high cooling rates. Distinction between resulting microstructures ascribed various proportions their athermal t...

The strength-toughness trade-off theory is always the focus in field of high-strength structure materials. Especially for deposited metals, matching and accepted toughness difficult to achieve. In this work, nucleation mechanism bainite ferrite (BF) impact were investigated systematically metals with different chromium (Cr) contents (0.3 wt %, 0.6 % 1.0 %). microstructure Cr was analyzed by a c...