Matches in SemOpenAlex for { <https://semopenalex.org/work/W832234854> ?p ?o ?g. }
Showing items 1 to 75 of
75
with 100 items per page.
- W832234854 abstract "High strength 7xxx aluminium alloys are used extensively in the aerospace industry because the alloys offer excellent mechanical properties. Unfortunately, the alloys can suffer localised corrosion due to the presence of large intermetallic particles at the alloy surface that are aligned in the rolling direction. Laser surface melting (LSM) techniques offer the potential to reduce and/or to eliminate the intermetallic phases from the surface of the alloy without affecting the alloy matrix.The present study concerns the application of LSM using an excimer laser to enhance the corrosion resistance of AA 7075-T6 aluminium alloy. The initial stage of the project was aimed at optimising the laser conditions for production of a uniform microstructure, with the increase in the corrosion resistance of the alloy being determined by potentiodynamic polarization measurements in sodium chloride solution. Low and high laser energy densities were used with a different number of pulses per unit area to treat the alloy surface, which were achieved by changing both the laser fluence and the pulse repetition frequency. A laser fluence of 3.3 J/cm2 with 80 pulses was subsequently selected as the optimum condition to treat the surface of the alloy. The composition and microstructure of the alloy before and after LSM treatment, and following corrosion tests, were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD).After the laser treatment, the surface and the cross-sections of the alloy showed a significant reduction in the number of large intermetallic particles and a relatively homogenous melted layer was generated that provided significant improvement in the resistance of the alloy against corrosion, as assessed by several corrosion test methods, including exfoliation corrosion (EXCO) tests. However, delamination of the melted layer was observed after extended testing in the EXCO solution which is possibly related to the formation of bands of fine magnesium and zinc-rich precipitates within the melted layer. Therefore, anodising in sulphuric acid was applied to the LSM alloy, in order to further increase the corrosion resistance and to protect the laser treated layer from delamination by generating a thin oxide film over the LSM layer. The results revealed that the anodic treatment increased the resistance of the alloy to exfoliation attack." @default.
- W832234854 created "2016-06-24" @default.
- W832234854 creator A5066588388 @default.
- W832234854 date "2013-03-06" @default.
- W832234854 modified "2023-09-22" @default.
- W832234854 title "Excimer Laser Surface Melting Treatment on 7075-T6 Aluminium Alloy for Improved Corrosion Resistance" @default.
- W832234854 hasPublicationYear "2013" @default.
- W832234854 type Work @default.
- W832234854 sameAs 832234854 @default.
- W832234854 citedByCount "0" @default.
- W832234854 crossrefType "dissertation" @default.
- W832234854 hasAuthorship W832234854A5066588388 @default.
- W832234854 hasConcept C120665830 @default.
- W832234854 hasConcept C121332964 @default.
- W832234854 hasConcept C159985019 @default.
- W832234854 hasConcept C179133402 @default.
- W832234854 hasConcept C191897082 @default.
- W832234854 hasConcept C192562407 @default.
- W832234854 hasConcept C20625102 @default.
- W832234854 hasConcept C22078206 @default.
- W832234854 hasConcept C26771246 @default.
- W832234854 hasConcept C27501479 @default.
- W832234854 hasConcept C2779821118 @default.
- W832234854 hasConcept C2780026712 @default.
- W832234854 hasConcept C2780477314 @default.
- W832234854 hasConcept C513153333 @default.
- W832234854 hasConcept C520434653 @default.
- W832234854 hasConcept C59891973 @default.
- W832234854 hasConcept C65029150 @default.
- W832234854 hasConcept C87976508 @default.
- W832234854 hasConceptScore W832234854C120665830 @default.
- W832234854 hasConceptScore W832234854C121332964 @default.
- W832234854 hasConceptScore W832234854C159985019 @default.
- W832234854 hasConceptScore W832234854C179133402 @default.
- W832234854 hasConceptScore W832234854C191897082 @default.
- W832234854 hasConceptScore W832234854C192562407 @default.
- W832234854 hasConceptScore W832234854C20625102 @default.
- W832234854 hasConceptScore W832234854C22078206 @default.
- W832234854 hasConceptScore W832234854C26771246 @default.
- W832234854 hasConceptScore W832234854C27501479 @default.
- W832234854 hasConceptScore W832234854C2779821118 @default.
- W832234854 hasConceptScore W832234854C2780026712 @default.
- W832234854 hasConceptScore W832234854C2780477314 @default.
- W832234854 hasConceptScore W832234854C513153333 @default.
- W832234854 hasConceptScore W832234854C520434653 @default.
- W832234854 hasConceptScore W832234854C59891973 @default.
- W832234854 hasConceptScore W832234854C65029150 @default.
- W832234854 hasConceptScore W832234854C87976508 @default.
- W832234854 hasLocation W8322348541 @default.
- W832234854 hasOpenAccess W832234854 @default.
- W832234854 hasPrimaryLocation W8322348541 @default.
- W832234854 hasRelatedWork W1969162980 @default.
- W832234854 hasRelatedWork W1971224404 @default.
- W832234854 hasRelatedWork W1990545878 @default.
- W832234854 hasRelatedWork W2012112073 @default.
- W832234854 hasRelatedWork W2020850899 @default.
- W832234854 hasRelatedWork W2049580293 @default.
- W832234854 hasRelatedWork W2050623843 @default.
- W832234854 hasRelatedWork W2074275363 @default.
- W832234854 hasRelatedWork W2075278992 @default.
- W832234854 hasRelatedWork W2088656877 @default.
- W832234854 hasRelatedWork W2120876306 @default.
- W832234854 hasRelatedWork W2185418737 @default.
- W832234854 hasRelatedWork W2354092938 @default.
- W832234854 hasRelatedWork W2369156173 @default.
- W832234854 hasRelatedWork W2371330028 @default.
- W832234854 hasRelatedWork W2463544477 @default.
- W832234854 hasRelatedWork W2480674557 @default.
- W832234854 hasRelatedWork W2496560018 @default.
- W832234854 hasRelatedWork W2530722995 @default.
- W832234854 hasRelatedWork W2581287324 @default.
- W832234854 isParatext "false" @default.
- W832234854 isRetracted "false" @default.
- W832234854 magId "832234854" @default.
- W832234854 workType "dissertation" @default.