Rolling, Partial and Full Annealing of 6061 Characterization of Microstructure, Tensile Strengths and Ductility
- 1 Mine Management Division, Department of Mining & Mineral Resources, Chinalco China Copper Corporation Limited, Beijing, China
- 2 Department of Mining and Materials Engineering, McGill University, Montreal, QC, Canada
Abstract
The scope of this research is to compare the grain morphology and hardness of aluminum alloy 6061 samples in three conditions: fully rolled (full hard), partially annealed (half hard), and fully annealed (soft). It is found that cold rolling produced elongated grains, parallel to the rolling direction, and the highest degree of grain-elongation is found as a band in the center of the specimens. Shearing effects of cold rolling the buckled surface produced equiaxed grains near the rolling surfaces, and may have played a role in reducing the effect of string forming solutes near the said surfaces. Higher percent reduction performed in one stage of cold rolling produced a higher increase in tensile strength and a more significant decrease in ductility. Annealing produced the softest material.
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