Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10652420 | Micron | 2005 | 14 Pages |
Abstract
Microstructural evolution due to equal-channel angular-pressing (ECAP) with increasingly severe deformation was investigated in a commercially pure 1200 aluminum alloy. A true strain of eight produced sub-micrometer scale grains and very fine subgrains in the grain interior. The deformation process was documented and described using field-emission (FEG) gun scanning and transmission electron microscopy techniques. After eight ECAP passes, the high-angle grain boundaries accounted for â¼70% of all boundaries. The fine spacing resolution of FEG scanning electron microscopy allowed detailed grain and subgrain statistical evaluation in the deformed microstructure; transmission electron microscopic inspection afforded appreciation of the role of very low-angle misorientation boundaries in the microstructure-refining process. ECAP results were compared with those produced by cold rolling. The material's texture evolved in a decreasing trend of Cube {001}ã100ã intensities in favor of Cube rotated toward the normal-to-pressing direction {001}ã120ã, while Goss {110}ã001ã and {111}ã110ã, {111}ã112ã directions slightly increased with strain.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
M. Cabibbo, E. Evangelista, C. Scalabroni,