动载荷下金属板表面的微物质喷射

 用石英晶体传感器技术，测量了冲击波作用下铝合金（Ly-12）和纯铅样品自由表面的微物质喷射量。在冲击压力为32 GPa时，测得光洁度为3.2、0.4、0.1 μm的铝合金的微物质喷射量分别为1.53～3.28 g/m²，0.2～0.3 g/m²和0.053～0.096 g/m²，对光洁度为3.2 μm的纯铅样品，在压力为13 GPa和47 GPa时，微物质喷射量分别微26.4～42.4 g/m²和183～328 g/m²。在最高冲击压力约为20 GPa时，做了多次冲击下的微物质喷射量测量，发现比单次冲击加载下的喷射量有很大的减少。结果表明，微物质喷射量与自由表面的加工条件、局部熔化和加载方式等因素有关。

MASS EJECTION FROM FREE SURFACE OF SHOCK-LOADED METALLIC PLATES

The mass ejection from free surfaces of aluminum alloy (Ly-12) and lead specimens under shock loading were measured using the piezelectric quartz crystal gauge technique. At shock pressure of 32 GPa, the ejected mass quantites of aluminum alloy with respec to the surface smooth finishes of 3.2 0.4 and 0.1 μm are 1.53～3.28 g/m², 0.2～0.3 g/m² and 0.053～0.096 g/m², respectively. At shock pressures of 13 and 47 GPa, the ejected mass quantites of lead with the surface smooth finish of 3.2 μm are 26.4～42.4 g/m² and 183～328 g/m², respectively. Experiments also show that maximum shock pressure of about 20 GPa, the measured mass ejected under multiple shocks decreases remarkably in comparing with that under single shock. It is shown that the mass ejection is dependent on conditions of machining of free surface local melfing and the shock loading process.