Laser pre-treatment of aluminum - An investigation of the adhesive bonding after surface modification

Visa enkel post
dc.contributor.authorSellén, Hannes
dc.contributor.authorBjörkman, Wilma
dc.contributor.departmentChalmers tekniska högskola / Institutionen för kemi och kemitekniksv
dc.contributor.departmentChalmers University of Technology / Department of Chemistry and Chemical Engineeringen
dc.contributor.examinerSkoglundh, Magnus
dc.contributor.supervisorWasmuth, Kerstin
dc.date.accessioned2024-07-01T06:28:52Z
dc.date.available2024-07-01T06:28:52Z
dc.date.issued2024
dc.date.submitted
dc.description.abstractThis project focused on the laser pre-treatment of aluminum sheet and extruded aluminum within the 6xxx-series, applied on battery pack applications at Volvo Cars. Laser parameters were evaluated by surface characterization and lap shear testing, correlating adhesion to surface properties. Four different adhesives were investigated together with three different laser parameters. The results were compared towards untreated surfaces as well as plasma treated surfaces. Results showed that laser effectively cleaned the treated surfaces, and that it altered the surface structure. Clean and structured surfaces was shown to improve adhesion by increasing the strength, and giving a more favorable failure mode of the adhesives. After tropical ageing, three of the adhesives increased in strength due to post curing, whereas one degraded below the desired strength. XPS measurements showed that laser treatment induced thermal oxide growth, and confirmed cleanliness results, both enabling stronger bonding. The oxide layer thickness of untreated aluminum was 3–4 nm, while laser treated surfaces showed oxide thickness of 25–55 nm. SEM-EDX was not applicable to study the oxide layers due to insufficient resolution. Laser parameter T2 showed the greatest potential, however new sets of laser parameters need to be studied, with a particular emphasis on a high %overlap scan.
dc.identifier.coursecodeKBTX12
dc.identifier.urihttp://hdl.handle.net/20.500.12380/308140
dc.language.isoeng
dc.setspec.uppsokPhysicsChemistryMaths
dc.subjectStructural adhesives
dc.subjectAluminum
dc.subjectLaser pre-treatment
dc.subjectLap shear testing
dc.subjectSurface characterization
dc.titleLaser pre-treatment of aluminum - An investigation of the adhesive bonding after surface modification
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster's Thesisen
dc.type.uppsokH
local.programmeMaterials chemistry (MPMCN), MSc
Ladda ner
Original bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
Laser pre-treatment of aluminum - An investigation of the adhesive bonding after surface modification, Wilma Björkman, Hannes Sellén.pdf
Storlek:
48.52 MB
Format:
Adobe Portable Document Format
Beskrivning:
Ladda ner
License bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
license.txt
Storlek:
2.35 KB
Format:
Item-specific license agreed upon to submission
Beskrivning:
Ladda ner
Samling
Examensarbeten för masterexamen