Effect of cold rolling reduction on texture, recrystallization and mechanical properties of UNS S32304 Lean Duplex stainless steel

Moura, Ariane Neves de; Alcântara, Cláudio Moreira de; Oliveira, Tarcísio Reis de; Cunha, Marco Antônio da; Machado, Marcelo Lucas Pereira

doi:10.1016/j.msea.2020.140577

Cited by 21 publications

(5 citation statements)

References 42 publications

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“…The average band thickness of the rolled sample after route A (67% height reduction for 5-pass) and route B (50% height reduction for 3-pass) was 27 and 38 μm, respectively ( Figure 2 a,b). Both microstructures dominated by deformation-textured grains consisted of {100}//ND (red-colored grains) and {111}//ND (blue-colored grains), which was typical of the microstructure of STS after rolling deformation [ 14 ]. The fraction of {100}//ND-oriented grains in route A was slightly higher as compared to route B.…”

Section: Resultsmentioning

confidence: 99%

Effect of Reduction Sequence during Rolling on Deformed Texture and Anisotropy of Ferritic Stainless Steel

et al. 2023

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This investigation studied the effect of reduction sequence during rolling of ferritic stainless steel on texture and anisotropy. A series of thermomechanical processes were performed on the present samples utilizing rolling deformation, with a total height reduction of 83% but with different reduction sequences, 67% + 50% (route A) and 50% + 67% (route B). Microstructural analysis showed that no significant difference was found in terms of the grain morphology between route A and route B. In terms of the texture, as compared to route A, route B developed a sharper texture on all components along the γ-fiber and a considerably higher fraction of boundaries that displayed 38°111 misorientations with respect to the surrounding deformed grains. In consequence, optimal deep drawing properties were achieved, where rm was maximized and Δr was minimized. Moreover, despite the similar morphology between the two processes, the resistance toward ridging was improved in the case of route B. This was explained in relation to the selective growth-controlled recrystallization, which favors the formation of microstructure with homogeneous distribution of the <111>//ND orientation.

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Section: Resultsmentioning

confidence: 99%

Effect of Reduction Sequence during Rolling on Deformed Texture and Anisotropy of Ferritic Stainless Steel

et al. 2023

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“…To alleviate this stored energy, dislocation cells are generated through the mechanisms of sliding and climbing rearrangement, triggered once the dislocation plug reaches a critical accumulation threshold. During the solution treatment, a sequence of continuous dynamic recrystallization events unfolds in proximity to low-angle grain boundaries, characterized by dislocations [42][43][44][45]. With a progressive augmentation in cold rolling magnitude, the plastic deformation grains within the two austenitic stainless steels, post solution treatment, demonstrably amplify, thereby diminishing the proportions of recrystallized grains and subcrystalline constituents.…”

Section: Strengthening Mechanismmentioning

confidence: 99%

Effect of Ni element on microstructure and properties of cold-rolled 316 L austenitic stainless steel

Zhang,

Xiao,

Cai

2024

Mater. Res. Express

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In this current investigation, the impact of Nickel (Ni) on the microstructural attributes and properties of a cold-rolled 316L sheet was examined. The microstructure and phase configuration of austenitic stainless steels, specifically 316L and 316LNi, were meticulously characterized through the utilization of metallography, X-ray Diffraction (XRD), and Electron Backscatter Diffraction (EBSD) techniques. Subsequent assessments were conducted to evaluate magnetic characteristics, microhardness, and tensile properties. The phase structure of both austenitic stainless steels conforms to a Face-Centered Cubic (FCC) crystal lattice, whereby the grain content oriented along the (110) plane progressively escalates with augmenting degrees of cold rolling. The magnetic conductivity of these austenitic stainless steels satisfactorily adheres to established standards. The incorporation of Nickel (Ni) into the alloy composition enhances the cold deformation capacity of 316L stainless steel. However, substantial plastic deformation yields heightened dislocation density, thereby promoting enlarged grain dimensions upon solution treatment. Throughout subsequent cold rolling deformation sequences, the augmented grain size observed in 316LNi stainless steel leads to a reduction in dislocation density within the equivalently ordered cold-rolled plate. Simultaneously, this augmented grain size engenders a decline in grain boundary content coupled with an augmentation in twin content. Consequently, the interplay of grain coarsening, diminished dislocation density, and twin-induced softening collectively bestows upon 316LNi stainless steel a lower tensile strength compared to 316L stainless steel, albeit accompanied by heightened plasticity.

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“…Therefore, the {001}<110> texture is shared by the recrystallized grains and DRV grains. Moura [35] reported that some of these grains with {001}<110> orientation can be recrystallized. In addition, this phenomenon is consistent with the CDRX mechanism of the fcc described in Section 4.2.…”

Section: Textural Evolution Of the Ferric And Austenitic Phasesmentioning

confidence: 99%

“…Low-strength γ-fiber texture is found in the FDZ of 850/10 s À1 and LDZ of 1000/0.01 s À1 , and there is almost no texture under other deformation conditions. Moura [35] reported that γ-fiber texture stores a lot of energy during the rolling process, and the existence of γ-fiber texture is prone to DDRX. Austenite was mainly composed of α-fiber, including brass {011} <211>, Gauss {011} <100>, and {011}<111> textures.…”

Section: Textural Evolution Of the Ferric And Austenitic Phasesmentioning

confidence: 99%

“…Grain deformation under this texture is severe and the dislocation density is high (Figure 7 and Table 2), indicating that there is high internal storage energy. [35] Because the low-stacking fault energy austenite DRV is significantly suppressed, the internal storage energy cannot be consumed by DRV. When the dislocation density and deformation reach a certain critical value, DDRX grains are usually formed by the way of grain boundary bowing.…”

Section: Textural Evolution Of the Ferric And Austenitic Phasesmentioning

confidence: 99%

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Electron Backscatter Diffraction Investigation of Heat Deformation Behavior of 2205 Duplex Stainless Steel

Song

Zhao

et al. 2021

steel research int.

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Duplex stainless steel is special because it contains two phases, namely, ferrite and austenite, which endow the duplex stainless steel the advantages of good strength, ductility, and corrosion resistance. On account of its excellent performance, it is widely used in fields as diverse as petroleum transportation, energy industry, marine industry, etc. [1][2][3] Different from that of general single-phase materials, the matrix of duplex stainless steel is always two phase in the process of processing. Ferrite and austenite show varying features in the deformation process of duplex stainless steel due to differences in the lattice structure, element content, and atomic diffusion ability between the two phases, and consequently obvious uneven deformation takes place. [4] At the same time, the high-stacking fault energy of ferrite renders the climbing and slipping of its dislocations easier, thereby leading to the occurrence of dynamic recovery (DRV). [5] On the contrary, the DRV of austenite is constrained due to its low-stacking fault energy, and dynamic recrystallization (DRX) has thus become its main softening mechanism. [3,4] In addition, the recrystallization features of the two phases differ remarkably. Ma [5] mentioned that when low-angle grain boundaries (LAGBs) continuously absorbed the dislocations caused by plastic deformation in ferrite, LAGBs rotated and increased gradually to form high-angle grain boundaries (HAGBs). The study found that the recrystallization of ferrite grains was characterized by continuous dynamic recrystallization (CDRX), whereas that of austenite showed the feature of discontinuous dynamic recrystallization (DDRX) (austenite grains nucleated in the high-energy region, mainly along grain boundaries, followed by the growth of new grains). Mozumder [6] also claimed that the recrystallization mechanisms of the ferrite and austenite phases of duplex lightweight steel were CDRX and DDRX, respectively. However, the softening mechanism of both ferrite and austenite was found to be the conversion from LAGBs to HAGBs in the study of Liu, [7] proving that the recrystallization mechanism of both phases was CDRX. The effect of ferrite on the recrystallization behavior of austenite in duplex stainless steel was investigated by Dehghan-Manshadi, [8] who believed that CDRX was the result of subgrain boundary coalescence and the softening mechanism of austenite. In fact, texture also has an important influence on the evolution of microstructure. Gao [9] found that γ-fiber has a higher Taylor factor in Ultra Purified 17% Cr Ferritic Stainless Steels, so it has higher storage energy than α-fiber, leading to preferred nucleation in grains with γ-fiber orientations during annealing. Moura [10] reported that the texture and recrystallization evolution in ferrite are

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Effect of cold rolling reduction on texture, recrystallization and mechanical properties of UNS S32304 Lean Duplex stainless steel

Cited by 21 publications

References 42 publications

Effect of Reduction Sequence during Rolling on Deformed Texture and Anisotropy of Ferritic Stainless Steel

Effect of Reduction Sequence during Rolling on Deformed Texture and Anisotropy of Ferritic Stainless Steel

Effect of Ni element on microstructure and properties of cold-rolled 316 L austenitic stainless steel

Electron Backscatter Diffraction Investigation of Heat Deformation Behavior of 2205 Duplex Stainless Steel

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