Static Recrystallization Kinetics and Crystallographic Texture of Nb-Stabilized Ferritic Stainless Steel Based on Orientation Imaging Microscopy

Malta, Paula Oliveira; Alves, Davi Silva; Ferreira, Aline Oliveira Vasconcelos; Moutinho, Iane Dutra; Dias, Carolina Arriel Pedroso; Santos, Dagoberto Brandão

doi:10.1007/s11661-016-3935-3

Cited by 30 publications

(8 citation statements)

References 38 publications

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“…For partially recrystallized samples, the recrystallization fraction and other analysis were carried out based on grain orientation spread (GOS) method . In this method, the recrystallized and deformed grains were distinguished by misorientation angle of 3° . An example is illustrated in Figure .…”

Section: Methodsmentioning

confidence: 99%

On Goss Orientation in Strip Cast Grain‐Oriented Silicon Steel

Fang

Zhang

et al. 2018

steel research int.

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In this study, the origin of Goss texture during intermediate annealing and Goss texture development during secondary annealing of strip cast grainoriented silicon steel are studied by electron backscattered diffraction (EBSD). The study indicates that Goss grains originate inside the shear bands of deformed {111}<112> and {111}<110> grains. Compared to {111}<110> grains, {111}<112> grains provide more number of nucleation sites for Goss grains. During subsequent recrystallization process, Goss grains exhibit a smaller growth rate than the average value of all the recrystallized grains. The development mechanism of Goss texture is concluded as oriented nucleation. Prior to secondary annealing, high fraction of high-energy boundaries (20 -45 misorientation angle) are observed in the vicinity of Goss grains, while significantly low fraction of Σ5 þ Σ7 þ Σ9 boundaries are observed. During secondary annealing, the domination of high energy boundaries around Goss grains is maintained, but the fraction of Σ5 þ Σ7 þ Σ9 boundaries decrease to be similar to the matrix grains. After the onset of the abnormal grain growth, the growing Goss grains continue to consist of high fraction of high-energy boundaries. These results are consistent with the high energy (HE) boundary model, which is used to explain the abnormal grain growth in the current strip casting route.

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Section: Methodsmentioning

confidence: 99%

On Goss Orientation in Strip Cast Grain‐Oriented Silicon Steel

Fang

Zhang

et al. 2018

steel research int.

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“…Malta et al 38 identified the attenuation of the hardness with an increase in the ferrite volume fraction by increasing the annealing temperature. The austenite hardness became more negligible with increasing ferrite volume fraction and consequently annealing temperature 38,55 .…”

Section: Mechanical Propertiesmentioning

confidence: 98%

“…After the annealing treatment of the cold rolled samples, a substantial decrease in microhardness is observed. The softening mechanism was promoted by recovery and recrystallization phenomena and the reversion of deformation-induced α′martensite 38,39,55,56 . The recrystallization kinetics was reduced with the homogenization step, for this reason, the hardness of the samples annealed is slightly lower.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Influence of Homogenization and Annealing Temperatures on the Microstructure, Mechanical Properties, and Passive Properties of Cold Rolled 2205 Duplex Stainless Steel

et al. 2022

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The effects of homogenization, cold working, and subsequent annealing treatment were studied on the microstructural evolution, mechanical properties, and passive properties of duplex stainless steel (DSS). A hot-rolled 2205 DSS was subjected to two processing routes. In one, the DSS goes through an extra homogenization step at 1100 °C for 1800 s before cold rolling. After cold deformation (~75%) the specimens were isothermally annealed at 900, 1000, and 1100 °C for 180 s. The microstructure evolution was studied by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XDR). Mechanical properties were evaluated by microhardness and tensile tests. The electrochemical behaviors were investigated by potentiodynamic measurements, electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis (MS). Chemical composition of the lowest corrosion resistant passive film was assessed by X-ray photoelectron spectroscopy (XPS). Homogenization before cold rolling lowered strain hardening, slowing the microstructural transformation process. The thermomechanical process did not change the semiconductor type of the passive films. However, grain refinement after annealing improved the corrosion resistance in borate buffer solution. Cold rolling significantly decreased the corrosion resistance. The passive film of the specimen homogenized before cold rolling had the lowest corrosion resistance and high amounts of Cr(OH) 3 and FeO.

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“…Após a laminação a frio (Figura1(c) [13]. A recristalização e crescimento de grãos no processo de recozimento afeta de forma significativa a dureza do material [14]. O aumento da temperatura de recozimento de 950°C para 1050°C, levou a uma leve diminuição da dureza do aço.…”

Section: Desenvolvimentounclassified

Efeito Da Temperatura De Recozimento Na Corrosão Por Pite Do Aço Inoxidável Lean Duplex Uns S32304

Assumpção¹,

Perasoli²,

Malta³

et al. 2018

ABM Proceedings

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Resumo O aço inoxidável duplex(AID) combina as propriedades mecânicas da ferrita à resistência à corrosão da austenita, sendo muito utilizado em aplicações industriais que requerem um bom desempenho quanto a essas propriedades. A classeleanduplex foi desenvolvida para minimizar as flutuações de custo, reduzindo elementos caros como Ni e Mo, sem grande efeitoem relação à corrosão e propriedades mecânicas. O objetivo deste trabalho foi avaliaro efeito da temperatura de recozimento na microestrutura, dureza e corrosão por pite de um aço inoxidável UNS S32304. Investigações microestruturais foram realizadas usando um microscópio eletrônico de varredura. A resistência à corrosão foi estudada por meio da técnica de polarizaçãopotenciodinâmica cíclica.As amostras apresentaram uma elevada resistência ao início da corrosão por pite em solução de NaCl 3,5%. Apesar da existência da similaridade entre os valores de potencial de circuito aberto, a temperatura de recozimento mostrou ter grande influência na resistência a corrosão do aço. A temperatura de recozimento afetou a estrutura e a composição dos filmes passivos na superfície do aço inoxidável duplex.O recozimento a 1000°Clevou a uma maior resistência a corrosão localizada. Palavras-chave:Aço inoxidável duplex; Recozimento; Corrosão por pite.

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Static Recrystallization Kinetics and Crystallographic Texture of Nb-Stabilized Ferritic Stainless Steel Based on Orientation Imaging Microscopy

Cited by 30 publications

References 38 publications

On Goss Orientation in Strip Cast Grain‐Oriented Silicon Steel

On Goss Orientation in Strip Cast Grain‐Oriented Silicon Steel

Influence of Homogenization and Annealing Temperatures on the Microstructure, Mechanical Properties, and Passive Properties of Cold Rolled 2205 Duplex Stainless Steel

Efeito Da Temperatura De Recozimento Na Corrosão Por Pite Do Aço Inoxidável Lean Duplex Uns S32304

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