Jet Streams Upon Impact on Joints of Structural Materials

In this work, we investigated the emission of a microparticle flow (shock-wave spraying) from stepped joints of structures under strong impact loading made of powerful energy materials (EM). The joints were formed by plates of aluminum alloy D16T, copper grade M1 and tin grade O1 (GOST), with a surface roughness of no more than 1.6 μm, The process of microparticle injection was recorded by the method of pulsed radiography of synchrotron radiation (SR) from the VEPP-3 collider, which generates stationary SR pulses with a duration of 1 ns and a period of 124 ns. A highly sensitive DIMEX detector with an aperture of 40 mm and a spatial resolution of 100 μm was used to record the X-ray shadow. The DIMEX detector is capable of recording an X-ray film of 100 frames. The X-ray shadow was recorded along the microparticle flow. To re-evaluate (calculate) the linear mass of the microparticle flow, the DIMEX detector was calibrated using aluminum and copper foil of different thicknesses. The X-ray shadow was recorded across the particle flow (jet) motion; this setup allows measuring the jet mass. The dynamics of the jet mass distributions and their flows (masses per unit time) for different materials are presented.