The effect of phase transformation route on the intergranular corrosion susceptibility of 2205 duplex stainless steel

Nima Haghdadi; Majid Laleh; Ali Kosari; M. H. Moayed; Pavel Cizek; Peter D. Hodgson; Hossein Beladi

doi:10.1016/j.matlet.2018.11.143

The effect of phase transformation route on the intergranular corrosion susceptibility of 2205 duplex stainless steel

Nima Haghdadi^*, Majid Laleh, Ali Kosari, M. H. Moayed, Pavel Cizek, Peter D. Hodgson, Hossein Beladi

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

29 Citations (Scopus)

Abstract

Two types of austenite morphologies, equiaxed and Widmanstätten, were produced through different phase transformation routes to evaluate the critical factors affecting the intergranular corrosion susceptibility in a 2205 duplex stainless steel. These distinct austenite morphologies behaved quite differently in secondary phase precipitation on exposure to sensitization temperature. Although the Widmanstätten microstructure was found to have a larger degree of coherent ferrite/austenite interface area compared with the equiaxed one, it showed a higher degree of sensitization. It was clarified that, in addition to the ferrite/austenite interface coherency, the extent of an interface area and presence of un-stable ferrite also play prominent roles in intergranular corrosion susceptibility.

Original language	English
Pages (from-to)	26-30
Journal	Materials Letters
Volume	238
DOIs	https://doi.org/10.1016/j.matlet.2018.11.143
Publication status	Published - 2019

Keywords

Duplex stainless steel
Intergranular corrosion
Precipitation
Sensitization

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10.1016/j.matlet.2018.11.143

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title = "The effect of phase transformation route on the intergranular corrosion susceptibility of 2205 duplex stainless steel",

abstract = "Two types of austenite morphologies, equiaxed and Widmanst{\"a}tten, were produced through different phase transformation routes to evaluate the critical factors affecting the intergranular corrosion susceptibility in a 2205 duplex stainless steel. These distinct austenite morphologies behaved quite differently in secondary phase precipitation on exposure to sensitization temperature. Although the Widmanst{\"a}tten microstructure was found to have a larger degree of coherent ferrite/austenite interface area compared with the equiaxed one, it showed a higher degree of sensitization. It was clarified that, in addition to the ferrite/austenite interface coherency, the extent of an interface area and presence of un-stable ferrite also play prominent roles in intergranular corrosion susceptibility.",

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T1 - The effect of phase transformation route on the intergranular corrosion susceptibility of 2205 duplex stainless steel

AU - Haghdadi, Nima

AU - Laleh, Majid

AU - Kosari, Ali

AU - Moayed, M. H.

AU - Cizek, Pavel

AU - Hodgson, Peter D.

AU - Beladi, Hossein

PY - 2019

Y1 - 2019

N2 - Two types of austenite morphologies, equiaxed and Widmanstätten, were produced through different phase transformation routes to evaluate the critical factors affecting the intergranular corrosion susceptibility in a 2205 duplex stainless steel. These distinct austenite morphologies behaved quite differently in secondary phase precipitation on exposure to sensitization temperature. Although the Widmanstätten microstructure was found to have a larger degree of coherent ferrite/austenite interface area compared with the equiaxed one, it showed a higher degree of sensitization. It was clarified that, in addition to the ferrite/austenite interface coherency, the extent of an interface area and presence of un-stable ferrite also play prominent roles in intergranular corrosion susceptibility.

AB - Two types of austenite morphologies, equiaxed and Widmanstätten, were produced through different phase transformation routes to evaluate the critical factors affecting the intergranular corrosion susceptibility in a 2205 duplex stainless steel. These distinct austenite morphologies behaved quite differently in secondary phase precipitation on exposure to sensitization temperature. Although the Widmanstätten microstructure was found to have a larger degree of coherent ferrite/austenite interface area compared with the equiaxed one, it showed a higher degree of sensitization. It was clarified that, in addition to the ferrite/austenite interface coherency, the extent of an interface area and presence of un-stable ferrite also play prominent roles in intergranular corrosion susceptibility.

KW - Duplex stainless steel

KW - Intergranular corrosion

KW - Precipitation

KW - Sensitization

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DO - 10.1016/j.matlet.2018.11.143

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VL - 238

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JO - Materials Letters

JF - Materials Letters

ER -

The effect of phase transformation route on the intergranular corrosion susceptibility of 2205 duplex stainless steel

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Keywords

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