This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Influence of the Copper Content on Microstructure and Corrosion Resistance of AZ91 Based Secondary Magnesium Alloys
Technical Paper
2006-01-0254
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Copper is one of the critical elements that can enrich in Mg alloys during recycling of post consumer scrap. Sources of copper are coatings on used magnesium parts or aluminium alloy contaminations in Mg scrap. Therefore, it is important for the development of secondary magnesium alloys to understand the effects of copper in the microstructure of magnesium AZ based alloys and how this influences the corrosion resistance.
Copper contents have been varied between 0 and 2 wt% in gravity die cast AZ91D alloy. The resulting microstructures were studied by LM, SEM + EDX and XRD. Already at low Cu contents (0.25 wt% Cu) ternary Mg-Al-Cu intermetallic phases were observed. Further increasing Cu concentrations resulted in more copper-rich phases, and a significantly reduced corrosion resistance was found. By correlating microstructure and corrosion properties, critical Cu concentrations were defined and corrosion minimising strategies for AZ based secondary alloys were developed.
Recommended Content
Authors
- C. Blawert - Center for Magnesium Technology, GKSS Forschungszentrum Geesthacht GmbH
- E. Morales - Center for Magnesium Technology, GKSS Forschungszentrum Geesthacht GmbH
- W. Dietzel - Center for Magnesium Technology, GKSS Forschungszentrum Geesthacht GmbH
- K. U. Kainer - Center for Magnesium Technology, GKSS Forschungszentrum Geesthacht GmbH
- C. Scharf - Institute for Metallurgy
- A. Ditze - Institute for Metallurgy
Topic
Citation
Blawert, C., Morales, E., Dietzel, W., Kainer, K. et al., "Influence of the Copper Content on Microstructure and Corrosion Resistance of AZ91 Based Secondary Magnesium Alloys," SAE Technical Paper 2006-01-0254, 2006, https://doi.org/10.4271/2006-01-0254.Also In
References
- Scharf C. Blawert C. Ditze A. Magnesium Kainer K.U. 6th International Conference Magnesium Alloys and their Applications Wolfsburg (D) 2003 980
- Hanawalt, J.D. Nelson C.E. Peloubet, J.A. Trans. AIME 147 1942 273
- Reichek, K.N. Clark K.J. Hillis, J.E. SAE Paper 850417
- Hillis J.E. Reichek, K.N. SAE Paper 860288
- Bakke, P. Sannes S. Albright, D. SAE Transactions, Paper 1999-01-0926
- Blawert C. Morales E. Dietzel W. Hort N. Kainer K.U. Scharf C. Ditze A. Endres F. Corrosion Properties of Secondary AZ91 Alloys Neelamegham, N.R. Kaplan, H.I. Powell, B.R. Magnesium Technology 2005 TMS 447 450