Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Experimental Study of Metallic Surfaces Exposed to Cavitation
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
2018 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

Cylinder liners in heavy-duty truck engines are subjected to intense vibrations and may sustain damage from the cavitation of bubbles in the coolant liquid, with some risks of leakage and engine breakdown. An ultrasonic oscillating probe was used to simulate the pitting rates and behavior of samples extracted from cylinder liners, which are made of grey cast iron, with differences in surface roughness, glycol and inhibitor content in coolant, coolant temperature and graphite flake class; bainitic microstructures were also tested. Measurements consisted of mass losses under set intervals during experiments lasting 2.5 or 4 hours. Affected surfaces were later evaluated with scanning electron microscopy and confocal microscopy.

Results indicate higher cavitation damage with: lower concentrations of glycol and absence of corrosion/cavitation inhibitors in the coolant liquid, lower liquid temperatures between 76⁰C and 90⁰C, and presence of B-type graphite class in the microstructure. Results regarding surface roughness were inconclusive.

A sequence of surface damage mechanisms has been proposed, with corresponding microscope observations, to explain the mass loss trends and the associated microstructural changes over time.

Ort, förlag, år, upplaga, sidor
2018. , s. 51
Nyckelord [en]
cavitation, cylinder liner, lamellar gray cast iron, erosion pitting, graphite class, cavitation
Nationell ämneskategori
Materialteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-231937OAI: oai:DiVA.org:kth-231937DiVA, id: diva2:1231098
Externt samarbete
Scania CV AB
Ämne / kurs
Materialdesign
Utbildningsprogram
Teknologie masterexamen - Teknisk materialvetenskap
Presentation
2018-06-11, Sefström, Brinellvägen 23, Stockholm, 10:00 (Engelska)
Handledare
Examinatorer
Tillgänglig från: 2018-07-05 Skapad: 2018-07-05 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

Open Access i DiVA

fulltext(11230 kB)171 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 11230 kBChecksumma SHA-512
6240e3969494275a940ff123c5f2e2934ef73a6577d3b10cdc8cd541289427dcfebb771a164c59a4c1df66cf29af98df7b991eb4993682b5fed0cfb596790e47
Typ fulltextMimetyp application/pdf

Av organisationen
Materialvetenskap
Materialteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 171 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 827 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf