Abstract
The effect of processing and microstructure on the stress-corrosion-creep behavior of die-cast rheoformed and conventional AZ91D Mg alloy was studied. Rheoformed alloy has a globular microstructure as compared with a dendritic microstructure of conventional die-cast Mg alloys. The rheoformed die-cast alloy was obtained by stirring the melt during the solidification in a spinning crucible at the casting temperature 580 °C, where the solid fraction amounted to about 40-60%. Due to the difference between the microstructure of Mg alloys produced by the two methods, the corrosion rate of rheoformed AZ91D alloy in the corrosive 0.9% NaCl and in the borate buffer solutions was significantly less than that of a conventional dendritic die-cast alloy. Due to the delay of metal dissolution, creep life of anodized rheoformed alloy in 3% Na2SO4 solution was more than an order of magnitude longer than that of an uncoated alloy.
Original language | English |
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Pages (from-to) | 395-399 |
Number of pages | 5 |
Journal | Journal of Materials Processing Technology |
Volume | 208 |
Issue number | 1-3 |
DOIs | |
State | Published - 21 Nov 2008 |
Keywords
- Anodizing
- Corrosion creep
- Corrosive solutions
- Rheoformed Mg alloy
ASJC Scopus subject areas
- Ceramics and Composites
- Computer Science Applications
- Metals and Alloys
- Industrial and Manufacturing Engineering