High Power Laser and Particle Beams, Volume. 33, Issue 4, 045001(2021)
Tantalum strength experiments on 10 MA facility
In metal strength research under extreme conditions, material’s response is closely related to microstructure, stress history, pressure and temperature, etc. Magnetically driven isentropic compression as a new experimental technique with strain rate between quasi-static and impact loading, has low increased entropy and temperature. This paper presen the experimental work carried out on a 10 MA facility in CAEP using the new technique. The 10 MA facility includes 24 modules, which help to control the load current shape in a relative wide range. Based on the characteristics of the 10 MA facility, the sample loading path was controlled by adjusting the load current waveform. In a certain pressure-strain rate range, the strength of tantalum was tested. The loading and unloading wave profile velocity history of tantalum samples with different thicknesses was successfully obtained, and the strength data of tantalum under a series of peak pressures were obtained. Comparison shows that the strength obtained is significantly higher than the strength under shock loading, but lower than that under quasi static loading More experimental studies on material dynamic characteristics will be carried out at the facility in the future.
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Zhaohui Zhang, Guilin Wang, Zhengwei Zhang, Fan Guo, Ce Ji, Zhen Fu, Yong Li. Tantalum strength experiments on 10 MA facility[J]. High Power Laser and Particle Beams, 2021, 33(4): 045001
Category: Pulsed Power Technology
Received: Mar. 8, 2021
Accepted: --
Published Online: Jun. 24, 2021
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