کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1616457 | 1516380 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The evolution of cold-rolled deformation microstructure of {0 0 1}〈1 1 0〉 grains in Ta–7.5 wt%W alloy foils The evolution of cold-rolled deformation microstructure of {0 0 1}〈1 1 0〉 grains in Ta–7.5 wt%W alloy foils](/preview/png/1616457.png)
The deformation structure of {0 0 1}〈1 1 0〉 grains in cold-rolled Ta–7.5 wt%W alloy foils has been investigated by transmission electron microscopy (TEM) and electron backscattering diffraction (EBSD). The results show that there are two kinds of {0 0 1}〈1 1 0〉 grains formed during the cold-rolled deformation process. Type A grains are surrounded by α-fiber, while type B grains are surrounded by γ-fiber. Dislocation analysis reveals a continuous evolution of dislocation substructures from dislocation arrays, to high dense dislocation walls, and to microbands in type A grains, while in type B grains from dislocation mesh to dislocation cells as a function of plastic strain. By both the analysis of EBSD and TEM, a new deformation mode in type A grains is developed.
► By the analysis of TEM and EBSD, there are two types of {0 0 1}〈1 1 0〉 grains formed during cold-rolled deformation with different surroundings.
► The evolution of deformation structure in type A and B grains is different.
► Dislocation analysis reveals a continuous evolution of the dislocation substructures from dislocation arrays, to high dense dislocation walls, and to microbands in type A grains, while in type B grains from dislocation mesh to dislocation cells.
► Meanwhile, a deformation mode is developed in grain A.
Journal: Journal of Alloys and Compounds - Volume 513, 5 February 2012, Pages 208–212