liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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
The use of acoustic emission technology in coating ductility testing at various temperatures
Dept. of Material Technology, Demag Delaval Indust. T. AB, Finspång, Sweden.
Dept. of Material Technology, Demag Delaval Indust. T. AB, Finspång, Sweden.
2004 (English)In: Proceedings of the ASME Turbo Expo 2004 [Volume 4: Turbo Expo 2004], ASME , 2004, 753-761 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this study, tests of ductility and ductile to brittle transition temperature DBTT of both PtAl RT22 and MCrAlY Amdry 997 coatings on both single crystal and polycrystalline substrates (CMSX-4, SCB, and In792) have been carried out. An acoustic emission detection technique that makes the detection of coating failures (micro cracking and delamination) possible has been employed during the tensile tests. The acoustic emission AE detection has been calibrated on the uncoated substrates and on some coated specimens at various testing temperatures and at different strain rate, together with metallurgical examination. A correlation between AE signals and failure types is established. It has been found that the substrate materials generate also some AE signals during plastic deformation. The amplitude of the AE signals depends strongly on the type of substrate material and the testing temperature but slightly on the strain rate. The substrate emissions may disturb the detection of coating failure. However, except for the disturbance from the substrate materials, the AE is still a sensitive, reliable, and useful technique to detect coating failures at various temperatures. The ductility results determined in this study have shown that the overlay coating Amdry 997 has a lower DBTT ∼550°C and higher ductilities than the diffusion coating RT22. Both of these differences indicate that Amdry 997 is much more ductile than RT22.

Place, publisher, year, edition, pages
ASME , 2004. 753-761 p.
Keyword [no]
Coatings, Acoustic emission
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:liu:diva-71042ISBN: 0-7918-4169-3 (print)OAI: oai:DiVA.org:liu-71042DiVA: diva2:444272
Conference
2004 ASME Turbo Expo; Vienna; 14 June 2004 through 17 June 2004
Available from: 2011-09-28 Created: 2011-09-28 Last updated: 2011-10-04

Open Access in DiVA

No full text

Authority records BETA

Moverare, Johan

Search in DiVA

By author/editor
Moverare, Johan
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 122 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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