کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
795173 | 1466758 | 2008 | 5 صفحه PDF | دانلود رایگان |

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.
Journal: Journal of Materials Processing Technology - Volume 208, Issues 1–3, 21 November 2008, Pages 395–399