Ridging Control in Transformable Ferritic Stainless Steels

Mola, Javad; Jung, Il-Chan; Park, Jieon; Chae, Dongho; Cooman, Bruno C. De

doi:10.1007/s11661-011-0824-7

Cited by 31 publications

(10 citation statements)

References 35 publications

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“…Unlike Q-P and Q-T, the matrix of conventional annealed specimens is ferrite, and there is a lot of Cr 23 C 6 in the ferrite grains and its boundaries. Because the time of conventional annealing is longer in the precipitation temperature range of 540 °C to A c1 (Initial Austenitizing Temperature) [35], the total amount of precipitates is obviously more than the former.…”

Section: Resultsmentioning

confidence: 99%

Microstructures and Properties of a Low-Carbon-Chromium Ferritic Stainless Steel Treated by a Quenching and Partitioning Process

et al. 2019

Materials

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Low chromium ferritic stainless steel has great potential in automobile structures for improved strength. In this study, quenching and partitioning (Q-P) treatment was applied to a low-carbon-chromium ferritic stainless steel and compared with traditional heat treatment (quenching-tempering [Q-T] and annealing) in terms of microstructure, mechanical properties, corrosion resistance, and deformation of plate. The results show that the quenching and partitioning (Q-P) treatment has a series of advantages over conventional heat treatments (quenching-tempering and annealing). In terms of mechanical properties, it achieves a good match between strength and plasticity by combining the advantages of “soft state” with high elongation resulting from conventional annealing and high strength "hard state” through the traditional quenching-tempering process. The material possesses better crash safety; for the quenching-partitioning (Q-P) process, quenching-tempering process, and annealing process, the production of strength plasticity is about 16 GPa%, 15 GPa%, and 14 GPa%, respectively. The material has low yield strength, high work hardening index (compared with Q-T), a smooth tensile curve, and no yield plateau (compared with annealing), so it has better forming performance and processing surface, and the corrosion resistance has also improved. The pitting potential of the samples produced by the quenching treatment of Q-P and Q-T increased by about 0.2 V, which is about 20% higher than the one by the traditional annealing process.

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Section: Resultsmentioning

confidence: 99%

Microstructures and Properties of a Low-Carbon-Chromium Ferritic Stainless Steel Treated by a Quenching and Partitioning Process

et al. 2019

Materials

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“…As coil A and coil B had similar processing schedule and only difference is soaking temperature, better ridging resistance in coil B can be explained by the higher soaking temperature. Mola et al [9] suggested that low γ phase fraction at soaking temperature and thus nucleation of large fraction of γ phase in the α phase is beneficial for ridging resistance. Thus high soaking temperature has beneficial effect on ridging resistance.…”

Section: Correlation Of Ridging and Microtexture Resultsmentioning

confidence: 99%

“…These authors noted that grain refinement due to martensite dispersion during cold rolling resulted in significant improvement in ridging. Mola et al [9] found that samples without hot band annealing when subjected to cold rolling and subsequent bell annealing exhibited superior ridging resistance compared to conventional bell annealed product which was continuously annealed after cold reduction. Batch annealing is an energy intensive operation which increases cost of the finished product.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hot Band Annealing and Cold Rolling on Texture and Ridging of 430 Stainless Steel Containing Aluminum

Patra¹,

Singhal²

2013

MSA

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An approach to optimize the processing parameters to get superior ridging resistance and mechanical properties in commercial production of 430 ferritic stainless steel has been studied. Attention was also paid to improve productivity and energy saving without hampering the surface and mechanical property aspects of the material. Hot rolled coils annealed by slow cooling under insulated cover exhibit better ridging resistance than bell annealing treatment with a minor decrease in ductility. Soaking temperature prior to hot rolling has a significant effect on ridging resistance.

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“…FSS offers various advantages in comparison with austenitic stainless steel, such as the excellent stress corrosion cracking resistance, high thermal conductivity and good corrosion resistance [5,6]. Even more important, no or very low nickel content, FSS is a more cost-effective alternative to expensive austenitic stainless steel, and indeed erode the market share of the latter gradually [7,8]. However, traditional FSS exhibits poor low-temperature toughness, high notch sensitivity, and susceptible intergranular corrosion.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Strain Rate on the Hot Deformation Behaviour of Ferritic Stainless Steel

Yan

et al. 2019

Met. Mater. Int.

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The flow behaviour and microstructure characteristics of a ferritic stainless steel were investigated using plain strain compression test on a Gleeble 3500 thermo-mechanical test simulator with a hydrawedge system in the temperature range of 850-1100 °C and strain rate range of 0.1-50 s −1. The phenomenological constitutive model and the relationship between the Zener-Hollomon (Z) parameter and flow stress were established. The results reveal that the flow softening phenomenon occurs at high strain rate, which is caused by the coupling effect of the adiabatic heating and dynamic recrystallisation (DRX). New grains nucleate preferentially at the original grain boundaries by strain-induced grain boundary migration. With an increase of temperature or strain rate, a part of new grains form in the interior of deformed grains. The DRX grain size and fraction increase with the increase of temperature, however, exhibit a non-linear relationship with strain rate.

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Ridging Control in Transformable Ferritic Stainless Steels

Cited by 31 publications

References 35 publications

Microstructures and Properties of a Low-Carbon-Chromium Ferritic Stainless Steel Treated by a Quenching and Partitioning Process

Microstructures and Properties of a Low-Carbon-Chromium Ferritic Stainless Steel Treated by a Quenching and Partitioning Process

Influence of Hot Band Annealing and Cold Rolling on Texture and Ridging of 430 Stainless Steel Containing Aluminum

Effect of Temperature and Strain Rate on the Hot Deformation Behaviour of Ferritic Stainless Steel

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