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Outline
The microstructures and intrinsic defects engendered during the compression process of manufacture of a PBX substitute material D-90031, as well its dynamic behavior and failure mechanisms were studied. By using digital image treatment technique, in-situ nano-indenter system, Split Hopkinson Pressure Bar (SHPB) and weight dropping tests, we obtained the features of microstructures, modulus and hardness of each constituent, dynamic properties, as well as the size distribution of pieces and failure modes. It was found that the grain shape changed with the applied compressive load, such as the grain was elongated along the direction vertical to the load application direction. The size distribution of pieces after impact meets a certain statistical rule. The results obtained are meaningful to deeply understand the relationship between the properties and microstructures of solid explosive.
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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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