Microstructural characterization and mechanical behavior during recrystallization annealing of Nb-stabilized type ASTM 430 and Nb-Ti-stabilized ASTM 439 ferritic stainless steels

Tanure, Leandro Augusto; Alcântara, Cláudio Moreira de; Santos, Dagoberto Brandão; Oliveira, Tarcísio Reis de; Gonzalez, Berenice Mendonça; Verbeken, Kim

doi:10.1016/j.jmrt.2019.07.015

Cited by 21 publications

(4 citation statements)

References 29 publications

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“…Figure 2 shows the morphology and size distribution of ferrite grains of the three steels by using EBSD. The results indicate that the grain size of ferritic stainless steel with high Nb content is smaller, which should be due to the inhibition of grain growth by solute drag of solid solution Nb during recrystallization annealing [7]. Previous studies [16,17] suggested that reducing the grain size is also helpful to improve the resistance to intergranular corrosion.…”

Section: Resultsmentioning

confidence: 83%

“…However, the addition of alloying elements is bound to lead to higher costs. Recent studies [6,7] have shown that adding Nb and Ti at the same time can play a double stabilizing role and refine inclusions to improve the condensate corrosion resistance of ferritic stainless steel. It means that inclusions are also one of the key factors affecting the corrosion resistance of materials.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on the Correlation between Inclusions and High Temperature Urea Corrosion Behavior in Ferritic Stainless Steel

Wang

Zhang

et al. 2021

Metals

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The influence of inclusion size and number density on high-temperature urea corrosion (HTUC) behavior of ferritic stainless steels was investigated in a simulated working environment of selective catalytic reduction (SCR) system in commercial vehicles. There is a positive correlation between the control level of inclusions and the resistance of HTUC. By slightly increasing the content of Nb in ferritic stainless steels, the inclusions, especially TiN, were significantly refined, and thus displayed an improvement in HTUC resistance. The interface between inclusions and the matrix becomes a fast channel for chromium precipitation during high-temperature nitriding induced by the decomposition of urea. Chromium nitrides will precipitate around the inclusions and wrap the inclusions, which will decrease the chromium equivalent of the matrix and reduce the resistance of ferritic stainless steels to HTUC. In addition, the high-temperature oxidation accompanied with thermal fatigue also makes the inclusions more likely to become the crack nucleation source, which can accelerate the material thinning and reduce its service life.

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Section: Resultsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Investigation on the Correlation between Inclusions and High Temperature Urea Corrosion Behavior in Ferritic Stainless Steel

Wang

Zhang

et al. 2021

Metals

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“…Figure 8 shows the misorientation distributions of FSS 430 annealed at different temperatures. For the as-received FSS specimens, the ferrite grains are dominated by the low angle grain boundaries (LAGBs, 2°< misorientation angles < 15°) due to the formation of subgrains during cold rolling [33]. The existed high angle grain boundaries (HAGBs, misorientation angles > 15°) are mainly originated from the accumulation of dislocations.…”

Section: Grain Boundariesmentioning

confidence: 99%

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

Sun

et al. 2022

Int J Adv Manuf Technol

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Systematic study on the microstructural evolution and mechanical properties of ferritic stainless steel (FSS) 430 with different annealing processes were carried out in the present work. The results show that microstructural re nement can be achieved by optimization of annealing processes, improving elongation, yield strength and tensile strength of FSS 430. An optimal annealing temperature of 950 ℃ is found with better homogeneity and enhanced mechanical properties among the cold-rolled and annealed FSSs. During annealing processes, the fraction of high angle grain boundaries of FSS 430 annealed at 950 ℃ is found to be the highest, indicating that a homogeneous microstructure with high recrystallization rate is formed inside the FSS 430 strips. In addition, high fraction of the hard grains (SF < 0.4) and low fraction of the soft grains are found inside FSS 430 annealed at 950 ℃, improving the plasticity of material. Overall, the optimization of annealing processes bene ts the microstructural re nement of FSS and thereby improving the mechanical properties of materials.

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“…The excellent deep drawing capacity of FSS is because of the anisotropy of their properties, which is a result of the crystallographic texture of the material. This characteristic makes FSS more resistant to thinning than austenitic stainless steels (ASSs), which makes it possible to produce deeper blankets [28]. For these reasons, FSS has been widely used in applications requiring a combination of corrosion resistance and deep design quality (DDQ), such as in automotive parts, home appliances, dishes and cutlery, chimney ducts, decorative components, and dairy and catering equipment.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Contact Conditions on Friction Properties of AISI 430 Steel Sheet with Deep Drawing Quality

et al. 2023

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This article aims to investigate the influence of different contact conditions on the friction properties of an Nb-stabilized AISI 430 ferritic stainless-steel sheet with deep drawing quality. Three tribological tests were performed: pin-on-disk, bending under tension, and strip-tension test. Moreover, counter samples of a hard metal (WC-12%Co) with surface finishes of 0.27 and 0.54 µm were used in the friction tests under dry and lubricated conditions. The influence of the texture and relative elongation of the strip on formability also were investigated. A comparative analysis of the results revealed that the coefficients of friction, wear, lubricant efficiency, and hardness measured below the wear surface indicated a strong dependence on surface roughness and the friction test type. The coefficients of friction obtained from the pin-on-disk test were higher than those obtained from the formability tests. In addition, the coefficient of friction increased with increasing relative elongation during the formability tests; it was higher in the bending-under-tension test than in the strip-tension test, mainly owing to the increasing strip surface roughness. The contact pressure during the formability tests was non-uniform during strip sliding under the tool. According to our results, for each friction condition in a specific area of the forming die, there is a value of the coefficient of friction, depending on the kinematic conditions. Therefore, the results can be used as input data to define design guidelines, improve productivity, and improve product quality from this steel sheet.

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Microstructural characterization and mechanical behavior during recrystallization annealing of Nb-stabilized type ASTM 430 and Nb-Ti-stabilized ASTM 439 ferritic stainless steels

Cited by 21 publications

References 29 publications

Investigation on the Correlation between Inclusions and High Temperature Urea Corrosion Behavior in Ferritic Stainless Steel

Investigation on the Correlation between Inclusions and High Temperature Urea Corrosion Behavior in Ferritic Stainless Steel

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

Influence of Different Contact Conditions on Friction Properties of AISI 430 Steel Sheet with Deep Drawing Quality

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