Evolution of microstructure and deformation behavior in Al–Ni added medium-Mn steel processed through intercritical / cold rolling and annealing

2021 ◽  
pp. 141852
Author(s):  
Biraj Kumar Sahoo ◽  
Vikas Chandra Srivastava ◽  
Avanish Kumar Chandan ◽  
Harpreet Singh Chhabra ◽  
Sandip Ghosh Chowdhury
Keyword(s):  
Cold Rolling ◽  
Deformation Behavior ◽  
Medium Mn Steel ◽  
Cold Rolling And Annealing ◽  
Evolution Of Microstructure ◽  
Mn Steel

scholarly journals Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 958 ◽  
Author(s):  
Mateusz Morawiec ◽  
Adam Grajcar ◽  
Władysław Zalecki ◽  
Carlos Garcia-Mateo ◽  
Marek Opiela
Keyword(s):  
Room Temperature ◽  
Intercritical Annealing ◽  
Isothermal Holding ◽  
Heat Treatments ◽  
Medium Mn Steel ◽  
Annealing Step ◽  
Fresh Martensite ◽  
Evolution Of Microstructure ◽  
Hot Rolled ◽  
Mn Steel

The work presents results of phase transformation kinetics of hot-rolled 5% Mn steel subjected to different heat treatments. Three different schedules were introduced: isothermal holding in a bainite region, coiling simulation and intercritical annealing. The evolution of microstructure components was investigated using dilatometric and metallographic analyses. According to obtained results, the medium-Mn steel exhibits high resistance for γ/α transformation during the bainite transformation and coiling simulation (upon cooling from the austenite region). During 5 h isothermal holding, no bainite and/or ferrite formation was detected. This results in the formation of martensite upon cooling to room temperature. Differently, when the steel was subjected to the intercritical annealing at 720 and 700 °C (upon heating from room temperature), a final microstructure consisted of ferrite, martensite and retained austenite. At 700 °C, no fresh martensite formation was detected upon cooling to room temperature. This means that the austenite was enriched in carbon during the intercritical annealing step enough to keep its thermal stability.

Time-evolution of microstructure and mechanical behaviour of double annealed medium Mn steel

2019 ◽  
Vol 35 (17) ◽  
pp. 2076-2083 ◽  
Author(s):  
Artem Arlazarov ◽  
Mohamed Goune ◽  
Olivier Bouaziz ◽  
Frédéric Kegel ◽  
Alain Hazotte
Keyword(s):  
Time Evolution ◽  
Mechanical Behaviour ◽  
Medium Mn Steel ◽  
Evolution Of Microstructure ◽  
Mn Steel

scholarly journals Austenite Stability and Deformation Behavior in Medium Mn Steel Processed by Cyclic Quenching ART Heat Treatment

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7132
Author(s):  
Chunquan Liu ◽  
Fen Xiong ◽  
Guanni Liu ◽  
Yong Wang ◽  
Yuxin Cao ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
Retained Austenite ◽  
Tensile Fracture ◽  
Trip Effect ◽  
Austenite Grain Size ◽  
Austenite Stability ◽  
Retained Austenite Stability ◽  
Medium Mn Steel ◽  
Cyclic Quenching ◽  
Mn Steel

This study investigated the austenite stability and deformation behavior of cyclic quenching-austenite reverse transformation processed Fe-0.25C-3.98Mn-1.22Al-0.20Si-0.19Mo-0.03Nb medium Mn steel. A number of findings were obtained. Most importantly, the extent of the TRIP effect was mainly determined by an appropriately retained austenite stability rather than its content. Simultaneously, chemical elements were the key factors affecting austenite stability, of which Mn had the greatest impact, while the difference of retained austenite grain size and Mn content resulted in different degrees of retained austenite stability. Additionally, there were still large amounts of strip and granular-retained austenite shown in the microstructure of the CQ3-ART sample after tensile fracture, revealing that the excessively stable, retained austenite inhibited the generation of an extensive TRIP effect.

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