کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1614547 | 1516336 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Nucleation mechanism of Mg17Al12-precipitates in binary Mg–7 wt.% Al alloy Nucleation mechanism of Mg17Al12-precipitates in binary Mg–7 wt.% Al alloy](/preview/png/1614547.png)
We show that the classical nucleation theory that describes the critical nucleus as a coherent pill-box fits the experimentally measured nucleation rate of Mg17Al12-precipitates in undeformed Mg–7 wt.% Al alloy much more accurately than the classical theory that describes the critical nucleus as an incoherent sphere. The nucleation of Mg17Al12-precipitates takes place in the transient nucleation regime. Coarsening of the Mg17Al12-precipitates occurs just before the steady state nucleation rate is reached.
► The evolution of precipitation in a binary Mg–Al alloy is demonstrated by scanning electron microscopy images.
► The nucleation kinetics are determined by application of the classical nucleation theory.
► The shape and surface energy of the nucleus is determined from the experimental results.
Journal: Journal of Alloys and Compounds - Volume 557, 25 April 2013, Pages 73–76