Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7972049 | Materials Science and Engineering: A | 2018 | 8 Pages |
Abstract
The effect of equal channel angular pressing on the microstructure and the mechanical properties of a 60-40 brass alloy and a brass alloy containing 2.5â¯wt% Lead was investigated. The process was carried out at 300â¯Â°C and 400â¯Â°C through the route C up to two passes. The microstructure of the specimens was evaluated using optical microscopy and scanning electron microscopy. It was found out that, after the second pass, some cracks appeared in the specimens at both temperatures. The investigations confirmed the existence of the liquid lead flow in the phase boundaries and crack walls at 400â¯Â°C, leading to the deeper crack formation, as compared to the specimen at 300â¯Â°C. Mechanical properties were evaluated through micro-hardness and tensile tests at room temperature. The results showed that the highest hardness and tensile strength corresponded to the specimen processes at 300â¯Â°C after two passes. In order to ensure a deeper study of the mechanical behavior of the specimens, dislocation density was measured using X-ray diffraction pattern; a drop of dislocation density at 400â¯Â°C was revealed.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
S.E. Mousavi, N. Naghshekesh, F. Ahmadi, B. Sadeghi, P. Cavaliere,