A combined TEM and SKPFM investigation of the surface layers on rolled AA5050 aluminium alloy using ultra-microtomy
| Autor: | Premendra, Laurens Katgerman, Herman Terryn, B. S. Tanem, J. H. W. deWit, Johannes M. C. Mol |
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| Přispěvatelé: | Materials and Chemistry, Metallurgy, Electrochemistry and Materials Science |
| Rok vydání: | 2008 |
| Předmět: |
Kelvin probe force microscope
Ultramicrotomy Materials science Metallurgy Surfaces and Interfaces General Chemistry Condensed Matter Physics Surfaces Coatings and Films Corrosion Transmission electron microscopy visual_art Microscopy aluminium alloy Materials Chemistry Aluminium alloy visual_art.visual_art_medium Surface layer Volta potential |
| Zdroj: | Surface and Interface Analysis. 40:1157-1163 |
| ISSN: | 1096-9918 0142-2421 |
| Popis: | This article studies the evolution of near-surface morphology as a function of various thermo-mechanical treatments along the fabrication line of rolled AA5050 aluminium alloy. Ultra-microtomy has been used to prepare cross-sectional thin foils for transmission electron microscopy (TEM) and proper surfaces for scanning Kelvin probe force microscopy (SKPFM) analysis. A slight increase in the Volta potential difference (between the inter-metallics and the matrix) between the as-cast surface and the surface obtained after the first hot-mill pass, emphasized that the changes in surface micro-structure, which in turn affect the corrosion and electrochemical properties of the finished product, had already occurred at that stage. The Volta potential difference during the subsequent hot-mill pass remained relatively constant. As far as the near-surface morphology wasconcerned,hot-rollingresultedintheformationofaheavilydeformedsurfacelayer.Annealingofthehot-rolledaluminium sheet resulted in partial re-crystallization of the surface layer. Subsequent cold-rolling re-introduced deformation in the near-surface region. Copyright c � 2008 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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