Hot deformation behavior and microstructure evolution of a stabilized high-Cr ferritic stainless steel

Mehtonen, Saara; Karjalainen, L.P.; Porter, David

doi:10.1016/j.msea.2013.01.077

Cited by 93 publications

(50 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The slowing down of SRX kinetics towards the completion of the recrystallization process in ferritic stainless steels has been previously reported by the present authors 18) and also by Sinclair et al 19) At 1 223 K, DRV is intense as evident from the flow stress curves in Fig. 1(a), and therefore it effectively reduces the stored energy and therefore also the driving force for SRX.…”

Section: Microstructure and Texture Evolutionsupporting

confidence: 84%

Microstructural and Texture Development during Multi-Pass Hot Deformation of a Stabilized High-Chromium Ferritic Stainless Steel

et al. 2014

View full text Add to dashboard Cite

With the ultimate target of improving the deep drawability of a dual-stabilized 21%Cr ferritic stainless steel, the evolution of the flow stress, microstructure, texture, dislocation structures and precipitation during multi-pass hot deformation were studied. Plane strain compression in three passes with 0.4 -0.5 pass strains and 20 s inter-pass times was employed together with scanning electron microscopy combined with electron backscatter diffraction (SEM-EBSD) and transmission electron microscopy (TEM). The temperature of the final pass was varied between 1 223 K and 923 K and the final cooling took place either by water quenching to room temperature or water cooling to 923 K followed by cooling at 0.33 K/s to room temperature. At 1 223 K, static recrystallization was almost complete during the 20 s inter-pass times and this randomized the texture. When the deformation temperature was lowered to 1 073 K or 923 K, in-grain shear bands were formed in the grains belonging to the γ fibre. The deformation temperature of the third pass had only a minor effect on the deformation texture intensity maxima. The final dislocation structure was not changed by the cooling rate from 923 K, but slow cooling enabled precipitation to occur. The results indicate that although the deformation conditions affect the deformed microstructures and dislocation structures, the effect of the deformation temperature on the texture was insignificant.

show abstract

Section: Microstructure and Texture Evolutionsupporting

confidence: 84%

Microstructural and Texture Development during Multi-Pass Hot Deformation of a Stabilized High-Chromium Ferritic Stainless Steel

et al. 2014

View full text Add to dashboard Cite

show abstract

“…It is commonly known that DRX mechanisms are mostly divided into three categories, including geometric dynamic recrystallization (GDRX), continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) [32,47,48]. In order to further identify the types of DRX for the studied superalloy at the strain rate range of 0.01-0.001s -1 , EBSD technique is used.…”

Section: Flow Softening Behaviormentioning

confidence: 99%

Study of Flow Softening Mechanisms of a Nickel-Based Superalloy With Δ Phase

Lin

Chen

et al. 2016

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

The flow softening behaviors of a nickel-based superalloy with δ phase are investigated by hot compression tests over wide ranges of deformation temperature and strain rate. Electron backscattered diffraction (EBSD), optical microscopy (OM), and scanning electron microscopy (SEM) are employed to study the flow softening mechanisms of the studied superalloy. It is found that the flow softening behaviors of the studied superalloy are sensitive to deformation temperature and strain rate. At high strain rate and low deformation temperature, the obvious flow softening behaviors occur. With the increase of deformation temperature or decrease of strain rate, the flow softening degree becomes weaken. At high strain rate (1s−1), the flow softening is mostly induced by the plastic deformation heating and flow localization. However, at low strain rate domains (0.001-0.01s−1), the effects of deformation heating on flow softening are slight. Moreover, the flow softening at low strain rates is mainly induced by the discontinuous dynamic recrystallization and the dissolution of δ phase (Ni3Nb).

show abstract

“…Os inoxidáveis ferríticos são utilizados em diversos tipos de aplicações, tais como, na indústria de linha branca e outros bens de consumo duráveis. O aço inoxidável ferrítico estabilizado ao Nióbio apresentam a vantagem de não sofrer a transformação de fase ferrita-austenita, sendo a fase ferrítica estável durante todo o processamento a quente [1,2]. O principal mecanismo de amaciamento durante a deformação a quente nos inox ferríticos estabilizados ao Nióbio é a recuperação dinâmica, que reduz a quantidade de energia armazenada na microestrutura.…”

Section: Introductionunclassified

Efeito Da Temperatura De Deformação a Quente Na Recristalização E Na Textura De Um Aço Inoxidável Ferrítico Aisi 430 Estabilizado Ao Nióbio

Braga¹,

Escobar²,

Oliveira³

et al. 2018

ABM Proceedings

View full text Add to dashboard Cite

ResumoO efeito da temperatura de deformação a quente na textura cristalográfica de um aço inoxidável ferrítico AISI 430 estabilizado ao Nióbio foi estudado por ensaios de torção a quente. A laminação de acabamento em laminador Steckel foi simulada utilizando diferentes faixas de temperatura, buscando promover o amaciamento por recristalização. Após cada ensaio, as amostras foram temperadas até a temperatura ambiente objetivando a análise das microestruturas geradas. Foram também realizados ensaios de torção interrompidos visando avaliar a ocorrência da recristalização entre passes. A técnica de EBSD foi utilizada para analisar a microestrutura das amostras ensaiadas, a textura formada e o tamanho de grão. Foi observado que a de temperatura de simulação que mais favorece a ocorrência da recristalização estática está entre 900 e 840 ºC e o tamanho de grão resultante é menor em tais condições. A textura de torção obtida está em concordância com a literatura. Palavras-chave: Textura cristalográfica; Recristalização; EBSD; Aço inoxidável ferrítico. EFFECT OF HOT DEFORMATION TEMPERATURE ON THE RECRYSTALLIZATION AND TEXTURE ON A FERRITIC STAINLESS STEEL AISI 430 NIOBIUM STABILIZED AbstractThe effect of the hot deformation temperature on the crystallographic texture of a ferritic stainless steel AISI 430 Nb-stabilized was studied by hot torsion test. The finishing hot rolling, in Steckel mill, was simulated using different temperature ranges aiming to promote softening by recrystallization. After the tests, the samples were quenched to room temperature in order to evaluate the microstructures. Interrupted torsion tests were also performed to assess the occurrence of interpass recrystallization. EBSD was used to analyze the obtained microstructures, texture and grain size. It was found that the best temperature range to promote static recrystallization was between 900 and 840 °C and the grain size is more refined in this condition. The torsion texture obtained concurs with literature.

show abstract

Hot deformation behavior and microstructure evolution of a stabilized high-Cr ferritic stainless steel

Cited by 93 publications

References 46 publications

Microstructural and Texture Development during Multi-Pass Hot Deformation of a Stabilized High-Chromium Ferritic Stainless Steel

Microstructural and Texture Development during Multi-Pass Hot Deformation of a Stabilized High-Chromium Ferritic Stainless Steel

Study of Flow Softening Mechanisms of a Nickel-Based Superalloy With Δ Phase

Efeito Da Temperatura De Deformação a Quente Na Recristalização E Na Textura De Um Aço Inoxidável Ferrítico Aisi 430 Estabilizado Ao Nióbio

Contact Info

Product

Resources

About