Microstructure and Properties of Cobalt- and Zinc-Containing Magnetic Magnesium Alloys Processed by High-Pressure Die Casting
| Autor: | Hans Jürgen Maier, Christian Demminger, Christian Klose |
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| Rok vydání: | 2015 |
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| Zdroj: | Magnesium Technology 2015 ISBN: 9783319486116 Magnesium Technology 2015 |
| DOI: | 10.1002/9781119093428.ch83 |
| Popis: | The inherent magnetic properties of lightweight alloys based on magnesium and cobalt offer a novel way in order to measure mechanical loads throughout the entire structural component using the magnetoelastic effect. Because the solubility of cobalt in the magnesium matrix is negligible, the magnetic properties mainly originate from Co-rich precipitates. Thus, the size and distribution of Co-containing phases within the alloy’s microstructure wields a major influence on the amplitude of the load-sensitive properties which can be measured by employing the harmonic analysis of eddy-current signals. In this study, Mg-Co-based alloys are produced by several casting methods which allow the application of different cooling rates, e.g. gravity die casting and high-pressure die casting. The differences between the manufactured alloys’ micro- and phase structures are compared depending on the applied cooling rate and the superior magnetic and mechanical properties of the high-pressure die cast material are demonstrated. |
| Databáze: | OpenAIRE |
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