Microstructural evolution of aluminum alloy 3003 during annealing
(1.江苏省苏州市苏州有色金属研究院
2.School of Materials Science and Engineering, Central South University, Changsha 410083, China
3.Suzhou Institute for Nonferrous Metals Processing Technology, Suzhou 215026, China)
2.School of Materials Science and Engineering, Central South University, Changsha 410083, China
3.Suzhou Institute for Nonferrous Metals Processing Technology, Suzhou 215026, China)
Abstract: The microstructural evolution of cold-rolled aluminum alloy 3003 during annealing was investigated by means of micro-hardness measurement, electrical resistivity measurement, optical microscopy and transmission electron microscopy. The interaction of recrystallization and precipitation of aluminum alloy 3003 was also discussed. The results show that the recrystallized grain size of cold-rolled aluminum alloy 3003 is strongly affected by precipitation during annealing. When precipitation occurs prior to recrystallization at low temperature(300 ℃), the grain structure becomes coarse, and the precipitation process is affected by the presence of lattice defects, i.e. high cold reduction results in a large number of precipitates. When annealing at 500 ℃, however, for the recrystallization is prior to precipitation, the precipitation is independent of cold deformation reduction and a fine, equiaxed grain structure is obtained.
Key words: aluminum alloy 3003; microstructural evolution; recrystallization; precipitation; electrical resistivity