The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel
(2018) In Corrosion Science 132. p.214-222- 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... (More)
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.
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- author
- Ali-Löytty, Harri ; Hannula, Markku ; Juuti, Timo ; Niu, Yuran LU ; Zakharov, Alexei A. LU and Valden, Mika
- organization
- publishing date
- 2018-03
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- A. Stainless steel, B. XPS, C. Interfaces, C. Oxidation, C. Segregation
- in
- Corrosion Science
- volume
- 132
- pages
- 214 - 222
- publisher
- Elsevier
- external identifiers
-
- scopus:85039953400
- ISSN
- 0010-938X
- DOI
- 10.1016/j.corsci.2017.12.026
- language
- English
- LU publication?
- yes
- id
- ab6b2240-760e-437e-86fd-384d852f495a
- date added to LUP
- 2018-01-11 07:44:57
- date last changed
- 2022-03-17 03:31:46
@article{ab6b2240-760e-437e-86fd-384d852f495a, abstract = {{<p>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)<sub>2</sub>(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)<sub>3</sub>O<sub>4</sub> spinel oxide at the surface was strongly suppressed.</p>}}, author = {{Ali-Löytty, Harri and Hannula, Markku and Juuti, Timo and Niu, Yuran and Zakharov, Alexei A. and Valden, Mika}}, issn = {{0010-938X}}, keywords = {{A. Stainless steel; B. XPS; C. Interfaces; C. Oxidation; C. Segregation}}, language = {{eng}}, pages = {{214--222}}, publisher = {{Elsevier}}, series = {{Corrosion Science}}, title = {{The role of (FeCrSi)<sub>2</sub>(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel}}, url = {{http://dx.doi.org/10.1016/j.corsci.2017.12.026}}, doi = {{10.1016/j.corsci.2017.12.026}}, volume = {{132}}, year = {{2018}}, }