| Title |
Grain Refinement and Mechanical Properties of Commercial Aluminum Alloy by Equal - Channel Angular Pressing |
| Authors |
진선화(Sun Hwa Jin),김형욱(Hyoung Wook Kim),강석봉(Suk Bong Kang) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
Using equal-channel angular pressing(ECAP) at room temperature, the grain size of 1080 Al(99.8% pure) was refined from ∼107 ㎛ to the submicrometer level. The effect of grain size refinement on the mechanical properties and recrystallization behavior was evaluated by the tensile test, micro-hardness test and microstructural observations. The grain size was reduced to 0.9 ㎛ after a single pass and the strength and the Vickers hardness was increased significantly. But the microstructures after a single pass were consisted of bands of elongated subgrains divided by low angle boundaries. With the pressing numbers, the microstructures were evolved into the grain structure with an equiaxed grains divided by high angle boundaries. As the strains induced into the samples were increased, the grain size recrystallized after annealing treatment became more refined. |