Effect of Starting As-cast Structure on the Microstructure–Texture Evolution During Subsequent Processing and Finally Ridging Behavior of Ferritic Stainless Steel

Modak, Pranabananda; Patra, Samir Kumar; Mitra, Rahul; Chakrabarti, Debalay

doi:10.1007/s11661-018-4566-7

Cited by 25 publications

(7 citation statements)

References 59 publications

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“…It is worthwhile noting that grain misorientations peak at less than 10º, which indicates that a large majority of new grains are formed through DRX as grains are formed through recovery of dislocations into low angle grain boundaries [12]. The presence of low angle grain boundaries is not usually found in the cast, as shown by Modak [5], therefore the formation of low angle grain boundaries is through the mechanism of CDRX. Longer interpass times show a greater degree of high angle grain boundary intensity relative to shorter interpass times correlating to work by numerous authors [11,18].…”

Section: Resultsmentioning

confidence: 99%

“…During cold drawing of FSS sheets, anisotropy manifests as corrugations on the sheet surface called ridges which require large amounts or polishing and grinding to remove. These ridges take away from the sheet's aesthetics and is of foremost importance in application [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Electron backscatter diffraction (EBSD) is a functional tool to study the effects of crystal orientation in processing of sheet products. Characterisation through EBSD can provide and improve insight into optimising the recrystallisation behaviour of FSS [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Electron backscatter diffraction postprocessing techniques for studying recrystallisation phenomenon of Ferritic Stainless Steel

et al. 2022

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The following article looks at using scanning electron microscopy- electron back scatter diffraction techniques to study recrystallisation structures produced through hot rolling of 436 ferritic stainless steel. Characterisation of recrystallisation textures was undertaken through analysis of misorientation angle distribution diagrams, orientation distribution function maps, inverse pole figures and Taylor factor maps. These techniques were applied in a case study where typical industrial hot rolling conditions were simulated through uniaxial compression tests in a Bähr Dilatometer 850D, whereby the effect of strain rate and interpass time on recrystallisation structures was investigated.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electron backscatter diffraction postprocessing techniques for studying recrystallisation phenomenon of Ferritic Stainless Steel

et al. 2022

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“…In this type of steel, shear bands are known to act as sites of nucleation for recrystallisation at grain boundaries and grain interiors (Engler & Randle, 2010;Zhang, et al, 2011;Huang & Logé, 2016). The recrystallization is however reported to occur at lower deformation temperatures (Huang & Logé, 2016;Modak, et al, 2018) The Taylor factor (TF) is a measure of the amount of slip that can occur per unit strain whereby grains with low TF are hard to recrystallize because localised deformation within the grain interior is limited. High TF grains on the other hand are known to preserve high stored deformation energy enhancing shear bands formation and subsequent recrystallisation (Zhang, et al, 2011;.…”

Section: Introductionmentioning

confidence: 99%

Effect of hot rolling parameters on recovery mechanism in 436 (17%Cr, Nb-Mo) ferritic stainless steel

Salojee

Annan

Siyayisa

et al. 2022

SATNT

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Ferritic stainless steel (FSS) grades are widely used for applications that require high strength and corrosion resistance. Their cost and versatility in the steel market have attracted a lot of interest from both industry and academic research. Despite their desirable properties, these steels grades experience surface defects as a result of microstructural evolution that evolves due to softening mechanism. The current study simulated the roughing hot rolling processes of AISI 436 (17%Cr, Nb-Mo) FSS to study the effects of inter-pass time and strain on the precipitation behaviour and the softening mechanisms in 436 FSS. The softening mechanisms and the resulting microstructures were investigated using SEM-EBSD technique. The results revealed Particle Stimulated Nucleation of new grains during the simulated roughing rolling which promoted recrystallisation due to strain accumulation. Stored deformation energy was found to increase with an increase in interpass time and strain.

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“…Nobuhiro [3] found that the (001) [110] initially-oriented columnar grains were hard to recrystallize without regard to rolling reduction so that the recrystallization structure was very inhomogeneous in grain size even in a heavily-rolled 19% Cr ferritic stainless steel. Modak, et al [4] reveals that large columnar crystals with cube orientation are very difficult to deform and recrystallize uniformly. Xie, et al [5] found that the column grain morphology and large grain size restrained the grain boundary sliding, and hence made it difficult to form a sub-boundary through strain induction or twining to separate the free-strain volumes from the deformed grains.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale simulation of deformation and recrystallization of austenitic stainless steels with solidified columnar crystal structures

Zhu

Chen

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Columnar grain structures (CCS) often distinct in steel ingots, which have to be refined and homogenized during forging. In this investigation, simulation of deformation and dynamic recrystallization of austenitic stainless steels with CCSs were carried out by macroscopic, mesoscopic (microscopic) and nanoscale simulation techniques. (1) Using molecular dynamics simulation method, the nano-CGSs model with different loading directions was simulated. The results show that the deformation stresses are anisotropic with variation of angles between the loading direction and the columnar crystal growth direction. The higher stresses present at the 0° and 90° angles due to higher dislocation density; However, the lower stresses present at the angles from 30° to 60° due to higher stacking faults and twins. (2) The cellular automata (CA) fractal rules were proposed to simulate nucleation and grain growth of dynamic recrystallization by introducing weighted variables considering Σ3 twin nucleation rate for the twinning-promoted recrystallization. The CA method of nucleation at primary columnar crystal boundaries, secondary dendrites and deformation bands was proposed to simulate the joint nucleation. (3) The coupling simulation of macroscopic thermal parameters by finite element method, solidification of columnar structures and hot deformation dynamic recrystallization by CA was realized.

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Effect of Starting As-cast Structure on the Microstructure–Texture Evolution During Subsequent Processing and Finally Ridging Behavior of Ferritic Stainless Steel

Cited by 25 publications

References 59 publications

Electron backscatter diffraction postprocessing techniques for studying recrystallisation phenomenon of Ferritic Stainless Steel

Electron backscatter diffraction postprocessing techniques for studying recrystallisation phenomenon of Ferritic Stainless Steel

Effect of hot rolling parameters on recovery mechanism in 436 (17%Cr, Nb-Mo) ferritic stainless steel

Multi-scale simulation of deformation and recrystallization of austenitic stainless steels with solidified columnar crystal structures

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