Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Grain Boundary Ridge Formation during High Temperature Oxiditation of Manganese Containing Steels
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH , 2008. , 42 p.
Keyword [en]
grain boundary ridges, TRIP-steel, IF-steel, recrystalization, hight temperature oxidation, selective oxidation grain boundary diffusion, grain boundary segregation, Mn
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-4778ISBN: 978-91-7415-000-1 (print)OAI: oai:DiVA.org:kth-4778DiVA: diva2:13905
Public defence
2008-06-05, Sal D3, KTH, Lindstedtsvägen 5 entréplan, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20100927Available from: 2008-06-02 Created: 2008-06-02 Last updated: 2010-09-27Bibliographically approved
List of papers
1. The Role of Grain Boundary Diffusion in Initial Selective Oxidation Kinetics of a Manganese-Aluminum TRIP Steel
Open this publication in new window or tab >>The Role of Grain Boundary Diffusion in Initial Selective Oxidation Kinetics of a Manganese-Aluminum TRIP Steel
2005 (English)In: Journal of Phase Equilibria and Diffusion, ISSN 1547-7037, Vol. 26, no 5, 539-546 p.Article in journal (Refereed) Published
Abstract [en]

Confocal scanning laser microscopy (CSLM) was used in real-time observation of alloy element oxidation of a manganese/aluminum transformation induced plasticity (TRIP) steel. CSLM images reveal a marked role of grain boundaries in the overall initial oxidation kinetics of the alloy and consequently in the morphology of the initial surface oxide. Changing the grain size and the oxidation temperature results in a change in the overall kinetics of selective oxidation and in the importance of oxidation at grain boundaries, respectively. Electron backscattered diffraction mapping was used to characterize the grain boundaries intersecting the surface over an area of the alloy. Subsequent CSLM observation of selective oxidation over the same area allowed quantification of oxidation kinetics as a function of individual grain boundary misorientation.

Keyword
Electron diffraction, Grain boundaries, Morphology, Oxidation, Plasticity, Reaction kinetics, Confocal scanning laser microscopy (CSLM), Selective oxidation, Surface oxides, Transformation induced plasticity (TRIP)
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-8547 (URN)10.1361/154770305X66691 (DOI)000232570000023 ()
Note
QC 20100914. Uppdaterad från submitted till published (20100914).Available from: 2008-06-02 Created: 2008-06-02 Last updated: 2010-11-25Bibliographically approved
2. Grain boundary ridge formation during initial high temperature oxidation of Mn/Al TRIP steel
Open this publication in new window or tab >>Grain boundary ridge formation during initial high temperature oxidation of Mn/Al TRIP steel
2007 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 87, no 23, 3479-3499 p.Article in journal (Refereed) Published
Abstract [en]

Confocal scanning laser microscopy (CSLM) was used in real-time observation of alloy element oxidation of a Mn/Al TRIP steel in an Ar-O-2 atmosphere. CSLM images reveal a marked role of grain boundaries in the overall initial oxidation kinetics of the alloy, and consequently in the morphology of the initial surface oxide. The oxidation on the alloy surface is dominated by the formation of Mn-rich oxide ridges along grain boundary traces on the surface. Oxide ridge formation kinetics was quantified by measurements on images extracted from real-time recordings of surface oxide evolution. Oxide ridge growth was found to take place at a constant rate. Scanning electron microscopy (SEM) images of the oxidized surfaces showed homogenous oxide ridges along straight grain boundary traces and heterogeneous oxide ridges along non-straight grain boundary traces. A transport mechanism of Mn to the surface is proposed, which relies on grain boundary segregation of Mn and on a relationship between grain boundary diffusivity and grain boundary character. It is suggested that when regarding alloys with significant grain boundary segregation of a solute, separate Wagner balances for internal vs. external oxidation is required for the grain lattices and the grain boundaries, respectively.

Keyword
Argon, Confocal microscopy, Diffusion, Grain boundaries, Image processing, Kinetics, Morphology, Real time systems, Scanning electron microscopy, Thermooxidation, Mn/Al TRIP steel, Oxide ridge formation, Surface oxide, Wagner balances
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-8548 (URN)10.1080/14786430701324139 (DOI)000248144200009 ()2-s2.0-34547310458 (Scopus ID)
Note
QC 20100914Available from: 2008-06-02 Created: 2008-06-02 Last updated: 2017-12-14Bibliographically approved
3. Grain Boundary Ridge Formation During Simultaneous Recrystallization and High Temperature Oxidfation of a Mn IF Steel
Open this publication in new window or tab >>Grain Boundary Ridge Formation During Simultaneous Recrystallization and High Temperature Oxidfation of a Mn IF Steel
(English)Manuscript (Other academic)
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-8549 (URN)
Note
QC 20100927Available from: 2008-06-02 Created: 2008-06-02 Last updated: 2010-09-27Bibliographically approved
4. The Effect of the Addition of Sb on Grain Boundary Ridge Formation During Simultanous Recrystallizaiton and High Temperature Oxidation of an Mn IF Steel
Open this publication in new window or tab >>The Effect of the Addition of Sb on Grain Boundary Ridge Formation During Simultanous Recrystallizaiton and High Temperature Oxidation of an Mn IF Steel
(English)Manuscript (Other academic)
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-8550 (URN)
Note
QC 20100927Available from: 2008-06-02 Created: 2008-06-02 Last updated: 2010-09-27Bibliographically approved
5. The observation of grain boundary ridge formation during high temperature oxidation of a Ti-Al-Nb intermetallic
Open this publication in new window or tab >>The observation of grain boundary ridge formation during high temperature oxidation of a Ti-Al-Nb intermetallic
(English)Manuscript (Other academic)
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-8551 (URN)
Note
QC 20100927. Technical noteAvailable from: 2008-06-02 Created: 2008-06-02 Last updated: 2010-09-27Bibliographically approved

Open Access in DiVA

fulltext(10781 kB)763 downloads
File information
File name FULLTEXT01.pdfFile size 10781 kBChecksum MD5
7eec3f53fb10d3bc3d8c5003d0a216e9637c7d7d31922952a6b6d54db11ade4539cb7521
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Thorning, Casper
By organisation
Materials Science and Engineering
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar
Total: 763 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 750 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf