Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7978450 | Materials Science and Engineering: A | 2015 | 7 Pages |
Abstract
The application of Fe-Si electrical steel as iron cores of transformers and engines requires it to be cold rolled into thin sheet because the deformation process is a path directly reaching a final dimension with good magnetic and mechanical properties. However, it is impossible for the Fe-6.5Â wt%Si alloy to be directly cold rolled due to its embrittlement. One alternative way to improve its workability is warm rolling. In this work, warm deformation behavior of Fe-6.5Â wt%Si alloy is studied. The results show that the flow stress decreases remarkably after 30% compression, accompanying with a reduction of micro-hardness, indicating a work softening behavior of the alloy. The size of the ordered domains and the degree of order decrease gradually with deformation, and a disordered alloy is obtained finally. When deformation reaches a certain value, small dislocation cells appear and finally subgrains are formed indicating the occurrence of dynamic recovery. It is concluded that the deformation-induced disordering and dynamic recovery are the main softening mechanisms.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Hui Li, Y.F. Liang, W. Yang, F. Ye, J.P. Lin, J.X. Xie,