کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1572343 | 1000678 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization of Al–Mn particles in AZ91D investment castings Characterization of Al–Mn particles in AZ91D investment castings](/preview/png/1572343.png)
Manganese is currently added to Mg–Al alloys in order to improve the corrosion behavior of cast components. A part of this manganese is dissolved in the magnesium matrix and the balance is found as fine Al(Mn,Fe) particles dispersed within castings. For AZ91D specimens prepared using the plaster mould investment casting process, these particles were observed in very large quantity at the surface of castings. These particles were characterized by scanning electron microscopy and electron probe microanalysis. It was found that they consist of Al8Mn5 phase and that their morphology and size depend on local solidification conditions. Their presence at the surface of the castings is related to low solidification rates and reduced thermal gradients at the mould/metal interface.
Journal: Materials Characterization - Volume 58, Issue 10, October 2007, Pages 989–996