The effect of chemical composition on microstructure and properties of TRIP steels
Journal Title: Journal of Achievements in Materials and Manufacturing Engineering - Year 2016, Vol 77, Issue 1
Abstract
Purpose: Various alloying strategies can be used to produce advanced high strengthsteels and this work offers comparison of results achieved for four different lowalloyed steels with 0.2-0.4 %C, 0.5-2 %Si, 0.6-1.5 %Mn, 0.03-0.06 %Nb and with0.8-1.33 %Cr. Microstructures obtained by two methods of thermo-mechanical treatmentwere analysed for each steel and compared with theoretical predictions of TTT (timetemperature transformation) diagrams calculated by JMatPro.Design/methodology/approach: Thermo-mechanical treatment of all steels was carriedout at thermo-mechanical simulator. Resulting microstructures were analyses by the meansof scanning electron microscopy, mechanical properties were measured by tensile test.Findings: It was found out that microstructures typical for TRIP (transformation inducedplasticity) steels can be obtained easily for low carbon steels alloyed by silicon oraluminium-silicon and micro-alloyed by niobium. Chromium addition influenced austenitedecomposition causing intensive pearlite formation in low carbon steel and predominantlymartensitic microstructure in middle carbon steel. These microstructures were not inagreement with calculated TTT diagrams.Research limitations/implications: To obtain ferritic-bainitic microstructure withretained austenite typical for TRIP steels, chromium alloyed steels require substantialoptimisation of processing parameters. This issue should be addressed in future work.Practical implications: JMatPro software is well equipped to calculate TTT diagramsfor steels alloyed by manganese, silicon and niobium, however further chromium additionchanged behaviour of the steel in a way that the software was not able to predict.Originality/value: Obtained results could be useful for consideration of chemicalcomposition of low alloyed steels with respect to resulting microstructures and properties.
Authors and Affiliations
L. Kučerová, M. Bystrianský
Keywords
Related Articles
- EP ID EP189314
- DOI -
- Views 146
- Downloads 0
Physical modelling of changes in the energy impact on a worker taking into account high-temperature radiation
Purpose: The purpose of this investigation is development of an experimental installation and definition the intensity of thermal irradiation at workplaces to ensure safety under condition of increased thermal radiation....
Power control of a wind energy based on a DFIG by sliding mode approach and pitch angle optimal control by genetic algorithm
Purpose: In this paper, a regulate of a variable wind energy conversion system, based ona doubly fed induction generator DFIG is proposed, the system we considered is controlledto generate maximum energy while minimizing...
Contemporary aesthetic restorative dental composite materials
Purpose: This is a review paper that gives an insight into the most popular group ofaesthetic dental materials - dental composite materials. This article describes the historicalbackground, the main features of this grou...
Control of the weld quality using welding parameters in a robotic welding process
Purpose: Since the welding automations have widely been required for industries and engineering, the development of the predicted model has become more important for the increased demands for the automatic welding system...
Nano-structured (Mo,Ti)C-C-Ni magnetic powder
Purpose: The paper presents the results of phase composition and magnetic properties of Mo-Ni-Ti-C nanostructured powders. The aim of this research is understanding the correlation between key magnetic properties and the...