| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7981893 | Materials Science and Engineering: A | 2014 | 6 Pages |
Abstract
Ultrafine grained (UFG) aluminum tubes were fabricated by the tubular channel angular pressing (TCAP) process. The microstructural evolution was characterized by transmission electron microscopy (TEM) and mechanical properties were evaluated by compression test and hardness measurements. TEM analysis of specimen subjected to one TCAP pass showed the formation of an array of elongated subgrains with high angle grain boundaries. Increase in the number of passes changes the elongated grains to equiaxed grains with ~310Â nm sizes. Microhardness value of the processed tubes was enhanced to 49.4Â Hv after one pass from an initial value of 32.9Â Hv. Yield and ultimate strengths were increased 2.5 and 2.28 times as compared to annealed specimen. Compression tests also showed that UFG aluminum tubes exhibit lower work hardening and almost perfect plastic behavior without any failure.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
M. Mesbah, G. Faraji, A.R. Bushroa,