Effect of Cr-rich carbide precipitates on austenite stability and consequent corrosion behavior of ultrafine-grained 304 stainless steel produced by cryogenic rolling and annealing treatment

Zhao, Miaomiao; Wu, Hongyan; Zhang, Bin; Lu, Jianing; Du, Linxiu

doi:10.1016/j.matchar.2022.112553

Cited by 29 publications

(12 citation statements)

References 66 publications

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“…The engineering stress-engineering strain curve of the NG/UFG sample is presented in Figure 6. The curve showed an obvious yield drop and a significant Lüders strain (20.8%), which has been repeatedly reported in previous works [28,39,40]. The formation of Lüders strain was due to the work hardening caused by martensitic transformation during tensile deformation, which compensated for the strain softening caused by the transformation-induced plasticity (TRIP) effect [40].…”

Section: Tensile Propertiessupporting

confidence: 81%

“…As shown in Figure 12(d), Ni-depleted phenomenon existed in the BCC structure due to the low solubility of Ni element in this structure. It should be noted that diffusion controlled the reverse transformation of α -martensite to austenite during annealing at 700°C [28], which required a longer annealing time. Ni element diffused from the BCC structure to the FCC structure during the annealing process, which also led to the lower Ni content in the later transition from BCC to FCC structure.…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…XRD studies were carried out at 40 kV and 150 mA, 2θ range from 40° to 100°, and at a scanning speed of 1°/min. The quantitative estimation of the phase volume fraction was carried out using the following Equation (1) [28]. where n is the number of diffraction peaks of α′-martensite or austenite, R is the relative intensities for three hkl selected reflections, and I is the integrated intensities.…”

Section: Methodsmentioning

confidence: 99%

“…Sun [26] and Lu [27] reported that the NG/UFG steel exhibits low-temperature superplastic-like deformation. Recent studies by our group [28] have found that Cr-rich carbide precipitates formed on the austenitic matrix during the reversion annealing process reduce the austenite stability of NG/UFG steel, as evidenced by promoting strain-induced martensite formation. It is worth noting that Cr element segregation at the austenite grain boundary is also found in, but have not performed in-depth studies of this phenomenon [28].…”

Section: Introductionmentioning

confidence: 99%

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Effect of element segregation on deformation mechanisms of nano/ultrafine-grained 304 stainless steel

Zhao

Liu

et al. 2023

Materials Science and Technology

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The effect of Cr and Ni element segregation on austenite stability and deformation mechanisms of nano/ultrafine-grained 304 stainless steel obtained by cryogenic rolling plus annealing treatment was systematically studied. The results showed that the nano/ultrafine-grained steel had a good combination of strength and ductility (yield strength ∼896 MPa, tensile strength ∼977 MPa, and elongation ∼39.6%). According to the findings, the formation of Cr segregation in the body-centered cubic structure at the intersection of austenite grain boundaries and localised austenite grains with low Ni content reduced the austenite stability of the nano/ultrafine-grained steel and promoted the generation of strain-induced martensite during plastic deformation, resulting in the deformation mechanism dominated by the transformation-induced plasticity effect.

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Section: Tensile Propertiessupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of element segregation on deformation mechanisms of nano/ultrafine-grained 304 stainless steel

Zhao

Liu

et al. 2023

Materials Science and Technology

Self Cite

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Microstructure, Mechanical, and Corrosion Performance of AA4343/AA3003/AA4343 Laminated Sheets Subjected to Cryorolling and Annealing

Samdane,

Guo,

Cui

et al. 2024

Adv Eng Mater

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The effects of cryorolling (CR), hot rolling (HR), and different annealing temperatures on the microstructure, mechanical, and corrosion performance of AA4343/AA3003/AA4343 laminated sheets are studied. Compared with the HR samples, the microstructure of the CR samples presents a significant decrease in the size of elongated grains and significantly large second‐phase particles Al(Mn, Fe)Si in the AA3003 alloy. Grains in CR samples subjected annealing at 200–300 °C become finer. Increasing to 400–550 °C, the grains begin to grow, and the Si is diffused into the core layer. A comparison of HR and CR processing reveals a significant increase in the yield strength from 153 to 209 MPa and the ultimate tensile strength from 168 MPa to 217 MPa of the laminated sheet. Potentiodynamic polarization measurements and immersion tests are conducted to assess the corrosion morphology. After being immersed in a 3.5% NaCl solution for two weeks, the clad surface of the laminated sheet exhibits uniform corrosion products and pitting corrosion, which shows the pitting corrosion depth of the CR sample improved compared to the HR sample. The study suggests that both CR and annealing can be useful for enhancing the mechanical properties, and corrosion morphology of laminated sheets.

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Design of Heterogeneous Lamella Microstructure of 316L Austenitic Stainless Steel and Effect of Aging on Its Mechanical Behavior and Corrosion Properties

Liu,

Li,

Gao

et al. 2024

steel research int.

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316L austenitic stainless steel (ASS) with a heterogeneous structure exhibits favorable mechanical properties at room temperature, promising excellent application potential. However, the thermal stability of 316L ASS with heterogeneous lamella structure (HLS) has not been adequately addressed yet. Herein, an HLS of 316L ASS is fabricated through 78% cold rolling followed by annealing at 750 °C for 13 min. The detailed investigation focuses on the influence of microstructure evolution on the mechanical properties and corrosion resistance of the alloy after aging at temperatures ranging from 350 to 550 °C for 100 h. The results show that a notable quantity of residual martensite persists even after annealing at high temperatures for a brief duration. The dislocation density of the test steel is reduced after long‐term aging treatment, and the residual martensite is further reversed into austenite during aging. In addition, the aging treatment also promotes further growth of nanocrystalline/ultrafine‐grained, which weakens the heterogeneous characteristics of HLS 316L ASS, resulting in a slight decrease in mechanical properties. However, the decrease in defect density and the enhancement of recrystallization degree are beneficial for eliminating most of the corrosion‐sensitive areas in the cold‐deformed structure, thereby improving the corrosion resistance.

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Effect of Cr-rich carbide precipitates on austenite stability and consequent corrosion behavior of ultrafine-grained 304 stainless steel produced by cryogenic rolling and annealing treatment

Cited by 29 publications

References 66 publications

Effect of element segregation on deformation mechanisms of nano/ultrafine-grained 304 stainless steel

Effect of element segregation on deformation mechanisms of nano/ultrafine-grained 304 stainless steel

Microstructure, Mechanical, and Corrosion Performance of AA4343/AA3003/AA4343 Laminated Sheets Subjected to Cryorolling and Annealing

Design of Heterogeneous Lamella Microstructure of 316L Austenitic Stainless Steel and Effect of Aging on Its Mechanical Behavior and Corrosion Properties

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