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New insights into the effects of surface nanocrystallization on the oxidation of 321 austenitic stainless steel in a humid oxygen environment at 1000 °C.

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Title: New insights into the effects of surface nanocrystallization on the oxidation of 321 austenitic stainless steel in a humid oxygen environment at 1000 °C.
Authors: Pour-Ali, Sadegh1, Kiani-Rashid, Ali-Reza1, Babakhani, Abolfazl1, Norouzi, Mohsen2, Virtanen, Sannakaisa1,3 virtanen@ww.uni-erlangen.de
Source: Corrosion Science. Feb2019, Vol. 147, p231-245. 15p.
Subjects: Austenitic stainless steel, Electrolytic oxidation, Nanocrystals, Diffusion, Vaporization, Polycrystals
Abstract: Graphical abstract Highlights • Effects of SNC on the oxidation behaviour of 321ASS were investigated. • SNC process significantly enhanced the diffusion of Cr and Mn. • Cr-vaporization remarkably affected by the SNC process. • The thickness and thickness uniformity of oxide layers were affected by SNC. • Schematic models were developed to describe the oxidation mechanisms. Abstract Oxidation behaviour of surface nanocrystallized 321 austenitic stainless steel (SN–321ASS) and its conventional polycrystalline counterpart (CP–321ASS) in O 2 + 10% H 2 O at 1000 °C was comparatively investigated. Uniform dense distribution of high diffusivity paths on the SN-321ASS greatly enhances the Cr and Mn diffusion throughout the oxidation front. Consequently: (i) formation of a thicker Cr-rich inner oxide layer on the SN–321ASS leads to a superior oxidation resistance, (ii) formation of Mn-rich spinel oxide as a uniform intermediate layer interrupts the easy access of oxygen and/or water to the Cr-rich inner oxide layer, thereby reducing the Cr-vaporization. [ABSTRACT FROM AUTHOR]
Copyright of Corrosion Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 133826575
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: New insights into the effects of surface nanocrystallization on the oxidation of 321 austenitic stainless steel in a humid oxygen environment at 1000 °C.
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  Data: <searchLink fieldCode="AR" term="%22Pour-Ali%2C+Sadegh%22">Pour-Ali, Sadegh</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kiani-Rashid%2C+Ali-Reza%22">Kiani-Rashid, Ali-Reza</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Babakhani%2C+Abolfazl%22">Babakhani, Abolfazl</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Norouzi%2C+Mohsen%22">Norouzi, Mohsen</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Virtanen%2C+Sannakaisa%22">Virtanen, Sannakaisa</searchLink><relatesTo>1,3</relatesTo><i> virtanen@ww.uni-erlangen.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Corrosion+Science%22">Corrosion Science</searchLink>. Feb2019, Vol. 147, p231-245. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Austenitic+stainless+steel%22">Austenitic stainless steel</searchLink><br /><searchLink fieldCode="DE" term="%22Electrolytic+oxidation%22">Electrolytic oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocrystals%22">Nanocrystals</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion%22">Diffusion</searchLink><br /><searchLink fieldCode="DE" term="%22Vaporization%22">Vaporization</searchLink><br /><searchLink fieldCode="DE" term="%22Polycrystals%22">Polycrystals</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Graphical abstract Highlights • Effects of SNC on the oxidation behaviour of 321ASS were investigated. • SNC process significantly enhanced the diffusion of Cr and Mn. • Cr-vaporization remarkably affected by the SNC process. • The thickness and thickness uniformity of oxide layers were affected by SNC. • Schematic models were developed to describe the oxidation mechanisms. Abstract Oxidation behaviour of surface nanocrystallized 321 austenitic stainless steel (SN–321ASS) and its conventional polycrystalline counterpart (CP–321ASS) in O 2 + 10% H 2 O at 1000 °C was comparatively investigated. Uniform dense distribution of high diffusivity paths on the SN-321ASS greatly enhances the Cr and Mn diffusion throughout the oxidation front. Consequently: (i) formation of a thicker Cr-rich inner oxide layer on the SN–321ASS leads to a superior oxidation resistance, (ii) formation of Mn-rich spinel oxide as a uniform intermediate layer interrupts the easy access of oxygen and/or water to the Cr-rich inner oxide layer, thereby reducing the Cr-vaporization. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Corrosion Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.corsci.2018.11.024
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 231
    Subjects:
      – SubjectFull: Austenitic stainless steel
        Type: general
      – SubjectFull: Electrolytic oxidation
        Type: general
      – SubjectFull: Nanocrystals
        Type: general
      – SubjectFull: Diffusion
        Type: general
      – SubjectFull: Vaporization
        Type: general
      – SubjectFull: Polycrystals
        Type: general
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      – TitleFull: New insights into the effects of surface nanocrystallization on the oxidation of 321 austenitic stainless steel in a humid oxygen environment at 1000 °C.
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            NameFull: Pour-Ali, Sadegh
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            NameFull: Kiani-Rashid, Ali-Reza
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              Text: Feb2019
              Type: published
              Y: 2019
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