Hot Deformation Behavior of As-Cast 2101 Grade Lean Duplex Stainless Steel and the Associated Changes in Microstructure and Crystallographic Texture

Patra, Samir Kumar; Ghosh, Abhijit; Singhal, L. K.; Podder, A. Saha; Sood, Jagmohan; Kumar, Vinod; Chakrabarti, Debalay

doi:10.1007/s11661-016-3759-1

Cited by 15 publications

(11 citation statements)

References 29 publications

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“…Since the probability of generating the stacking faults is very small, the screw dislocations can cross-slip, allowing accommodating large deformations with a small change in the orientation of their crystallographic structure. Thus, the grain refinement is achieved by the successive subdivision of the dislocations walls [26][27][28][29] . Figure 7 represent the engineering stress-strain curves for AR and WR samples.…”

Section: Resultsmentioning

confidence: 99%

Effect of Warm Rolling on the Corrosion and Mechanical Properties of UNS S32205 Duplex Stainless Steel

et al. 2019

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Duplex stainless steel (DSS) has been considered as an excellent alternative for applications where high corrosion resistance and high mechanical strength are required. Therefore, microstructure and properties of DSS remain topics of much interest. For this purpose, the effect of warm-rolling was studied in a duplex stainless steel. The focus of this work was 2205 which is one of the most useful type of DSS. Although evolution of microstructure, texture and tensile properties during warm rolling of DDS have been reported, there is no study on the effect of warm rolling on corrosion resistance of 2205 DSS. In this context, the objective of this work is to evaluate microstructure, texture and mechanical and corrosion properties of UNS S32205 DSS after warm rolling. The duplex stainless steel was warm-rolled at 600°C up to 60 and 80% thickness reduction and submitted to electrochemical tests. The electrochemical behaviour of warm-rolled 2205 in the chlorine ion environment was evaluated using cyclic potentiodynamic polarization (CPP) and electrochemical impedance spectroscopy (EIS). The samples exhibited an excellent corrosion resistance in 3.5% NaCl solution. The study showed that the thermomechanical treatment used favoured the formation of the passive film and led to a greater polarization resistance. This behaviour is consistent with the pits density observed by scanning electron microscopy (SEM) and the crystallographic microtexture of the steel.

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Section: Resultsmentioning

confidence: 99%

Effect of Warm Rolling on the Corrosion and Mechanical Properties of UNS S32205 Duplex Stainless Steel

et al. 2019

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“…In a low-nitrogen material, austenite will be attacked and with increased nitrogen content, nitrogen will strengthen the austenite and ferrite will be attacked. Nitrogen also hardens the austenite phase significantly thereby increasing the strength difference of ferrite and austenite significantly as per the hardness increment shown during deformation of 2101 DSS by Patra et al [10]. In comparison to austenitic stainless steel, nitrogen content in duplex stainless steel can't influence the sigma phase precipitation.…”

Section: Effect Of Chemical Composition In Dssmentioning

confidence: 94%

“…Ferritic solidification is not difficult as impurities is soluble in ferrite. In the as cast structure, mainly coherent or semi-coherent interphase boundaries can be observed where ferrite and austenite follow Kurdjumov-Sachs (K-S) or Nishiyama-Wassermann (N-W) orientation relationship (OR) [10,12,45]. EBSD inverse pole figure map of as-cast and hot-rolled samples is presented in Fig.…”

Section: Castingmentioning

confidence: 99%

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Characteristics and Manufacturability of Duplex Stainless Steel: A Review

Patra

Agrawal²,

Mandal

et al. 2021

Trans Indian Inst Met

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Duplex stainless steels (DSS) have been growing continuously as they are cost effective alternative to austenitic stainless steel with better mechanical and corrosion resistance. Duplex stainless steel compositions are expanding in both directions towards leaner and richer chemistry for popular as well as very critical applications. The strength of DSS is its high yield strength compared to popular austenitic series and corrosion resistance particularly pitting and chloride stress corrosion cracking. Challenges of DSS remain in the embrittlement phase formation during the manufacturing of highly alloyed DSS, hot cracking and formability of the steel. Super duplex and hyper duplex steels are finding extremely critical application due to their good mechanical properties and corrosion resistance even replacing Nickel based alloys and Ti alloys in few applications. The paper reviews the characteristics and manufacturability of duplex stainless steel including recent developments.

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“…Uma vez que a probabilidade de se gerar as falhas de empilhamento é muito pequena, as deslocações em parafuso podem realizar o escorregamento cruzado, permitindo acomodar grandes deformações com uma pequena alteração na orientação de sua estrutura cristalográfica. Assim, o refinamento de grãos é alcançado pela subdivisão sucessiva das paredes de deslocações [18,[25][26][27].…”

Section: Microscopia Eletrônica De Transmissãounclassified

Formação Da Microestrutura, Textura E Desempenho Mecânico Do Aço Inoxidável Duplex Uns S32205 Submetido a Laminação a Morno

Santos¹,

Alves²,

Ferreira³

et al. 2017

Anais Do Congresso Anual Da ABM

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Resumo Nesse trabalho o aço inoxidável duplex UNS S32205 foi laminado a morno a 600°C com 60 e 80% de redução e, em seguida, resfriado ao ar. A microestrutura foi caracterizada por microscopia óptica, eletrônica de varredura, de transmissão, difratometria de raios X e EBSD. O comportamento mecânico foi avaliado por ensaios de tração e dureza. Os limites de resistência mecânica alcançaram 1185 MPa e 1328 MPa após laminação a morno de 60 e 80%, respectivamente. No aço como fornecido, laminado a quente e recozido, o limite de resistência foi de 774 MPa. A dureza nessa condição foi de 281 HV, e de 410 HV para ambas as condições de laminação a morno. A microtextura da ferrita α apresentou a fibra α e a componente cubo girado, enquanto a austenita realçou as componentes latão, cobre e cubo em menor intensidade. A fibra α e a componente latão são características da textura de deformação das respectivas fases. A subestrutura foi caracterizada por intensa formação de emaranhado e florestas de deslocações. Na fase ferrítica verificou-se intensa formação de subestrutura de deslocações e subgrãos. Na fase austenítica a subestrutura foi caracterizada por deslizamento planar de deslocações e formação de emaranhados de deslocações. A comparação do comportamento mecânico com o aço na condição como fornecida revelou que o trabalho a morno elevou o nível de resistência mecânica entre 65 a 72% com redução da ductilidade. Esses resultados vislumbram perspectivas de rotas inovadoras na produção industrial do aço inoxidável duplex dessa classe.

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Hot Deformation Behavior of As-Cast 2101 Grade Lean Duplex Stainless Steel and the Associated Changes in Microstructure and Crystallographic Texture

Cited by 15 publications

References 29 publications

Effect of Warm Rolling on the Corrosion and Mechanical Properties of UNS S32205 Duplex Stainless Steel

Effect of Warm Rolling on the Corrosion and Mechanical Properties of UNS S32205 Duplex Stainless Steel

Characteristics and Manufacturability of Duplex Stainless Steel: A Review

Formação Da Microestrutura, Textura E Desempenho Mecânico Do Aço Inoxidável Duplex Uns S32205 Submetido a Laminação a Morno

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