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Outline
To study the effects of a 200 ℃/1~10 h aging treatment on the mechanical properties, microstructure and corrosion resistance of 6082 aluminum alloy, tensile tests, intergranular corrosion tests are conducted, and SEM examination is performed on the tensile fracture surfaces. The results indicate that at 200 ℃ , the number of precipitated phases in the alloy matrix gradually increases with prolonged aging time, while the alloy strength first increases and then decreases. Additionally, the fracture morphology transitions from a ductile fracture dominated by numerous equiaxed dimples to a mixed fracture characterized by fine and shallow dimples along with tear ridges. As the aging time increases, the number of pitting corrosion pits and cracks on the alloy surface gradually increases and they interconnect. After peak aging, the number of corrosion pits and cracks significantly decreases, and the intergranular corrosion susceptibility of the alloy shows a trend of first increasing and then decreasing. Therefore, the under-aged state of 6082 aluminum alloy has both high strength and intergranular corrosion resistance, making it suitable for large-scale mass production applications in automotive parts.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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