Metallography of Mg Alloys
Processing and composition determine microstructural properties. To reveal the microstructure, the metallographic investigation is a commonly used method, and therefore, it is a crucial part in the characterization of metals and alloys. Choosing incorrect preparation steps will lead to artefacts and misleading conclusions due to the compositional analysis and processing steps influencing the microstructure. However, in the published literature, it is obvious that not all reported microstructures are in fact true microstructures of investigated material. Especially in the case of magnesium and its alloys, special care is necessary to obtain micrographs with a true representation. What quite often is presented are surfaces that show artefacts rather than microstructures. Examples of this will be shown as well as their counterpart real microstructures.
KeywordsMagnesium Metallography Grinding Polishing Etching Artefacts
The authors would like to thank a few unnamed authors from papers that they reviewed. DT and SG also would like to thank the Deutsche Forschungsgemeinschaft for funding a part of this work under grants TO817/4-1 and ME4487/1-1.
- 1.W. Bulian, E. Fahrenhorst, Metallography of Magnesium and its Alloys, F. A. Hughes & Co Ltd, London, UK, 1944Google Scholar
- 2.M. M. Avedesian, H. Baker, Magnesium and Magnesium Alloys, ASM Specialty Handbook, ASM International, Materials Park, OH, USA, 1999Google Scholar
- 3.V. Kree et al., The Metallographical Examination of Magnesium Alloys, Practical Metallography 41  (2004) 233–246Google Scholar
- 4.Y. Xu, Effect of Gd and Nd addition on Young’s modulus of Mg-based binary alloys, K. N. Solanki et al. (Eds.), Magnesium Technology 2017 (2017) 341–347Google Scholar
- 5.Y. Xu, Investigations on Young’s modulus and strengthening mechanism of Mg-Gd and Mg-Nd alloys, PhD Dissertation, TU Berlin, Berlin, Germany, 2018Google Scholar