Thermo-mechanical processing of high-manganese austenitic TWIP-type steels

Prospects for the Use of New-Generation Steels of the AHSS Type for Collision Energy Absorbing Components

This work discusses the development of the microstructure and mechanical properties of medium-carbon steel that contains silicon, aluminium and microadditions of Nb and Ti. Two cooling strategies were designed based on the thermodynamic equilibrium calculations and continuous cooling transformation diagram, which was determined for plastically deformed austenite. The cooling paths enabled the production of ferrite based and bainite based steels. The specimens were obtained via the thermomechanical rolling process with isothermal holding of steel at 450°C. Microstructure investigations were performed using light, scanning and transmission microscopy methods. The distribution and amount of retained austenite were determined using the electron backscatter diffraction technique, whereas transmission electron microscopy allowed the identification of the morphology of the γ phase. The amount of austenite and its carbon content were assessed using X-ray diffraction. Relations between microstructure and m...

Microstructure–property relationships in TRIP aided medium-C bainitic steel with lamellar retained austenite

The study was devoted to the hot-working behavior and the microstructure evolution of four thermomechanically processed Mn–Al-alloyed multiphase steels. Determination of the hot deformation resistance of investigated steels was carried out on the basis of continuous compression, double-hit compression, and seven-step compression tests simulating conditions of hot strip rolling. The experiments were carried out using the Gleeble 3800 thermomechanical simulator. The physical simulation of hot strip rolling consisted of seven deformation steps characterized by decreasing strain, temperature, and interpass time whereas the strain rate values were gradually increased. A special attention was paid to the effect of Nb microaddition on the hot-working behavior and microstructure evolution with the finishing hot-working temperature varying in a range from 950 to 750°C. Morphological features of a bainite-based matrix and retained austenite were identified using light microscopy and scanning electron microscopy techniques. A fraction of retained austenite was determined by X-ray diffraction. The increase in the Mn content increases the softening kinetics of austenite. It was also found that the best conditions for thermal stabilization of retained austenite occur at 950°C for the steels containing 3% Mn.

Effect of Finishing Hot‐Working Temperature on Microstructure of Thermomechanically Processed Mn–Al Multiphase Steels

Non-Metallic Inclusions and Hot-Working Behaviour of Advanced High-Strength Medium-Mn Steels

Modelling of structure changes in TRIP type steel during hot deformation

Symulacja procesu walcowania na gorąco stali przeznaczonych na karoserie

Structure changes in TRIP type steel during hot deformation

Wpływ parametrów cieplno-plastycznych na zmiany technologicznej plastyczności i struktury stali ferrytyczno-austenitycznej odkształcanej na gorąco

Symulacja zmian struktury zachodzących w stali typu TRIP podczas walcowania na gorąco

M. Adamczyk

Papers

Modelling of structure changes in TRIP type steel during hot deformation

Symulacja procesu walcowania na gorąco stali przeznaczonych na karoserie

Structure changes in TRIP type steel during hot deformation

Wpływ parametrów cieplno-plastycznych na zmiany technologicznej plastyczności i struktury stali ferrytyczno-austenitycznej odkształcanej na gorąco

Symulacja zmian struktury zachodzących w stali typu TRIP podczas walcowania na gorąco