The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel

Harri Ali-Löytty; Markku Hannula; Timo Juuti; Yuran Niu; Alexei A. Zakharov; Mika Valden

doi:10.1016/j.corsci.2017.12.026

The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel

Harri Ali-Löytty, Markku Hannula, Timo Juuti, Yuran Niu, Alexei A. Zakharov, Mika Valden

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

13 Citations (Scopus)

13 Downloads (Pure)

Abstract

Microalloying of stainless steel with reactive elements increases oxidation resistance but makes the alloy prone to microstructural changes. XPS results reveal changes in the initial oxidation mechanism on Ti–Nb stabilized ferritic stainless steel (EN 1.4521) after 120 h heat treatment at 650 °C. Age-precipitation of (FeCrSi)2(MoNb)-type Laves phase resulted in less pronounced surface segregation and oxidation of microalloying elements. Si oxidizes preferentially at the Laves precipitate locations via outward diffusion forming diffusion barrier for the other scale forming elements. Most significantly the diffusion of Mn and the formation of low volatile (Mn,Cr)3O4 spinel oxide at the surface was strongly suppressed.

Original language	English
Pages (from-to)	214-222
Journal	Corrosion Science
Volume	132
DOIs	https://doi.org/10.1016/j.corsci.2017.12.026
Publication status	Published - Mar 2018
Publication type	A1 Journal article-refereed

Publication forum classification

Publication forum level 3

Access to Document

10.1016/j.corsci.2017.12.026

CORSCI_2017_456_post-print
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 23.4 MBLicence: CC BY-NC-ND

http://urn.fi/URN:NBN:fi:tty-201801031015Licence: CC BY-NC-ND

Cite this

@article{215c12b286b74ea78278a316d1dd333e,

title = "The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel",

abstract = "Microalloying of stainless steel with reactive elements increases oxidation resistance but makes the alloy prone to microstructural changes. XPS results reveal changes in the initial oxidation mechanism on Ti–Nb stabilized ferritic stainless steel (EN 1.4521) after 120 h heat treatment at 650 °C. Age-precipitation of (FeCrSi)2(MoNb)-type Laves phase resulted in less pronounced surface segregation and oxidation of microalloying elements. Si oxidizes preferentially at the Laves precipitate locations via outward diffusion forming diffusion barrier for the other scale forming elements. Most significantly the diffusion of Mn and the formation of low volatile (Mn,Cr)3O4 spinel oxide at the surface was strongly suppressed.",

author = "Harri Ali-L{\"o}ytty and Markku Hannula and Timo Juuti and Yuran Niu and Zakharov, {Alexei A.} and Mika Valden",

year = "2018",

month = mar,

doi = "10.1016/j.corsci.2017.12.026",

language = "English",

volume = "132",

pages = "214--222",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier",

}

TY - JOUR

T1 - The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel

AU - Ali-Löytty, Harri

AU - Hannula, Markku

AU - Juuti, Timo

AU - Niu, Yuran

AU - Zakharov, Alexei A.

AU - Valden, Mika

PY - 2018/3

Y1 - 2018/3

N2 - Microalloying of stainless steel with reactive elements increases oxidation resistance but makes the alloy prone to microstructural changes. XPS results reveal changes in the initial oxidation mechanism on Ti–Nb stabilized ferritic stainless steel (EN 1.4521) after 120 h heat treatment at 650 °C. Age-precipitation of (FeCrSi)2(MoNb)-type Laves phase resulted in less pronounced surface segregation and oxidation of microalloying elements. Si oxidizes preferentially at the Laves precipitate locations via outward diffusion forming diffusion barrier for the other scale forming elements. Most significantly the diffusion of Mn and the formation of low volatile (Mn,Cr)3O4 spinel oxide at the surface was strongly suppressed.

AB - Microalloying of stainless steel with reactive elements increases oxidation resistance but makes the alloy prone to microstructural changes. XPS results reveal changes in the initial oxidation mechanism on Ti–Nb stabilized ferritic stainless steel (EN 1.4521) after 120 h heat treatment at 650 °C. Age-precipitation of (FeCrSi)2(MoNb)-type Laves phase resulted in less pronounced surface segregation and oxidation of microalloying elements. Si oxidizes preferentially at the Laves precipitate locations via outward diffusion forming diffusion barrier for the other scale forming elements. Most significantly the diffusion of Mn and the formation of low volatile (Mn,Cr)3O4 spinel oxide at the surface was strongly suppressed.

U2 - 10.1016/j.corsci.2017.12.026

DO - 10.1016/j.corsci.2017.12.026

M3 - Article

SN - 0010-938X

VL - 132

SP - 214

EP - 222

JO - Corrosion Science

JF - Corrosion Science

ER -

The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel

Abstract

Publication forum classification

Access to Document

Fingerprint

Cite this