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
Cost Effective and Robust Stainless Steel in Exhaust Environments for EGR systems
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Exhaust Gas Recirculation, EGR, is a system for reduction of environmental unfriendly emissions, especially NOX, for heavy duty engines. During recirculation the exhaust gases are cooled in the EGR coolers and the decrease in exhaust temperature results in formation of a corrosive condensate. The materials of the components of the EGR system thus need to be corrosion resistant.

The aim of this thesis was evaluate the stress corrosion cracking resistance on austenitic and duplex stainless steels. A cost analysis in regard to choice of material and manufacturing methods for the EGR cooler component has also been performed.

Two different materials were tested, austenitic stainless steel grade 1.4404 and one duplex stainless steel grade 1.4462. The method used was slow strain rate testing using an environmental chamber containing a synthetic condensate.

The results shows that the austenitic stainless steel grade 1.4404 is sensitive to pitting corrosion following stress corrosion cracking at chloride concentrations equal to or above 0.33 wt% in the exhaust condensate. The duplex stainless steel grade 1.4462 did not show any signs of corrosion and is therefore immune to stress corrosion cracking for the corresponding environment.

Place, publisher, year, edition, pages
2013.
Keyword [en]
stress corrosion cracking, EGR-system, duplex, austenitic, stainless steel
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-124779OAI: oai:DiVA.org:kth-124779DiVA: diva2:638552
External cooperation
Scania CV AB
Subject / course
Materials Science and Engineering
Educational program
Master of Science - Engineering Materials Science
Supervisors
Examiners
Available from: 2013-08-30 Created: 2013-07-31 Last updated: 2013-08-30Bibliographically approved

Open Access in DiVA

Examensarbete - Erica Törnvall(236 kB)120 downloads
File information
File name SUMMARY01.pdfFile size 236 kBChecksum SHA-512
f0c3ab47494fc69d736a2c70356021f4f5eff81deee40895170ae8e071d1e2a6c592b77363dbf4564e805a0de45aa544c74e6a1d328d6679312af6245b8e164a
Type summaryMimetype application/pdf

By organisation
Materials Science and Engineering
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar
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

urn-nbn

Altmetric score

urn-nbn
Total: 95 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