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Outline
This study systematically investigated the effects of temperature on the spall behavior of Invar36 alloy through plate impact experiments and microstructural characterization techniques. Utilizing a single-stage light gas gun loading platform combined with a high-temperature heating device, the experiments measured free surface velocity profiles and spall strength variations in samples with different segregation orientations within the temperature range of 20 ℃ to 300 ℃. Results demonstrate that the spall strength of Invar36 alloy exhibits a linear decrease with increasing temperature, with elevated temperatures significantly weakening its dynamic tensile resistance. Microstructural damage analysis reveals that at room temperature, voids nucleate and propagate along element segregation bands, while high-temperature damage concentrates at grain boundaries. Elevated temperatures reduce the constraining effect of segregation and facilitate material softening through thermally activated dislocation motion. The research elucidates the central role of temperature in governing spall strength and damage mechanisms, providing a theoretical foundation for failure-resistant design of Invar36 alloys under high-temperature impact conditions.
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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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