Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn)
| Autor: | Chamini Lakshi Mendis, A. Pardo, M.C. Merino, Norbert Hort, Marta Mohedano, B. Mingo, E. Matykina, Raul Arrabal, R. del Olmo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Alloy Intermetallic chemistry.chemical_element 02 engineering and technology Electron microprobe engineering.material 01 natural sciences Corrosion Engineering 0103 physical sciences Rare earth lcsh:TA401-492 General Materials Science Magnesium Volta potential ddc:620.11 Eutectic system 010302 applied physics Kelvin probe force microscope Mechanical Engineering Metallurgy 021001 nanoscience & nanotechnology Microstructure chemistry Mechanics of Materials SKPFM engineering lcsh:Materials of engineering and construction. Mechanics of materials EPMA 0210 nano-technology |
| Zdroj: | Mingo, B, Arrabal, R, Mohedano, M, Mendis, C L, del Olmo, R, Matykina, E, Hort, N, Merino, M C & Pardo, A 2017, ' Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn) ', Materials and Design, vol. 130, pp. 48-58 . https://doi.org/10.1016/j.matdes.2017.05.048 Materials & Design, Vol 130, Iss, Pp 48-58 (2017) Mingo, B.; Arrabal, R.; Mohedano, M.; Mendis, C.L.; del Olmo, R.; Matykina, E.; Hort, N.; Merino, M.C.; Pardo, A.: Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn). In: Materials and Design. Vol. 130 (2017) 48-58. (DOI: 10.1016/j.matdes.2017.05.048) |
| ISSN: | 0261-3069 |
| Popis: | Microstructure and corrosion behaviour of a Mg-9Al alloy with minor alloying additions (Mn, Y, Nd, Ca and Sn) are evaluated. All of the additions form Al-rich intermetallics with varying amounts of Fe, while Ca and Sn are also incorporated into the eutectic β-phase (β-Mg17Al12). Special attention is given to the surface potential values of the microconstituents, which are related to the formation of microgalvanic couples. Scanning Kelvin Probe Force Microscopy (SKPFM) measurements revealed that all the alloying elements, except Sn, reduced the potential difference between the secondary phases and the matrix, which is the main reason for the improvement of the corrosion resistance of Mn-, Y- and Nd-modified alloys. The beneficial effect of Ca is additionally related to the microstructure refinement and an increased area fraction of the β-phase. Keywords: Magnesium, Rare earth, Corrosion, SKPFM, Volta potential, EPMA |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|