کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1627780 | 1516458 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The microstructural evolution in large-grained Ni–40Al during superplastic deformation The microstructural evolution in large-grained Ni–40Al during superplastic deformation](/preview/png/1627780.png)
Superplastic behavior has been found in Ni–40Al intermetallics with large grains. The large-grained Ni–40Al alloy exhibited all deformation characteristics of conventional fine-grained superplastic alloys. Metallographic examination (OM) showed that the average grain size of large-grained Ni–40Al alloys decreased during superplastic deformation from 220 μm before deformation to 25 μm after deformation to fracture. Electron back-scattered diffraction (EBSD) and transmission electron microscopy (TEM) showed that there were a great number of sub-grain boundaries which formed a network and among which the proportion of low and high angle boundaries increased with the increase of strain. The observed superplastic phenomenon is explained by continuous recovery and recrystallization.
Journal: Journal of Alloys and Compounds - Volume 415, Issues 1–2, 18 May 2006, Pages 177–181