Hot-compression behavior of Al alloy 5182 |
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Authors: | TANG Jian-guo HUANG Xing-xing ZHANG Xin-ming |
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Affiliation: | School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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Abstract: | Hot-compression of aluminum alloy 5182 was carried out on a Gleeble-1500 thermo-simulator at deformation temperature ranging from 350 °C to 500 °C and at strain rate from 0.01 s-1 to 10 s-1 with strain range from 0.7 to 1.9. The microstructures and macro-textures evolution under different conditions were investigated by polarized optical microscopy and X-ray diffraction analysis, respectively. The basic trend is that the hot-compression stress increases with the decrease of temperature and increase of strain rate, which is revealed and elucidated in terms of Zener-Hollomon parameter in the hyperbolic sine equation with the hot-deformation activation energy of 143.5 kJ/mol. An empirical constitutive equation is proposed to predict the hot-deformation behavior under different conditions. As deformation temperature increases up to 400 °C, at strain rate over 1 s-1, dynamic recrystallization (DRX) occurs. Cube orientation {100}-001- is detected in the recrystallized sample after hot-compression. |
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Keywords: | aluminum alloy 5182 hot-compression texture microstructure |
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