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This paper studied the twinning behavior of AZ31 magnesium alloy in the high cycle fatigue process and the microscopic characteristics of twins, and studied systematically the influence of orientation and fatigue load on twinning in the high cycle fatigue deformation process of magnesium alloy and the role of twins in the fatigue deformation process with the help of metallographic observation, fatigue performance analysis, fracture morphology observation, Transmission Electron Microscope (TEM) and other analysis methods. The results show that twinning could play an important role to the fatigue deformation of magnesium alloy at room temperature, the ratio of twinning varies in different fatigue loading directions, the radio of twinning is the highest for loading perpendicular to the extrusion direction.
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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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