Based on three series of planar impact tests performed on beryllium copper samples, having thickness 0.25–6 mm, individual contributions of beryllium clusters (in the as quenched supersaturated solid solution), Guinier-Preston zones (GP, formed following ageing at 300°C for 26 min) and metastable $\gamma "$ precipitates (crystallizing after 400 min ageing at 300°C) to the strength of alloy were quantified along with corresponding activation volumes. These data being coupled with Transmission Electron Microscopy evaluation of geometry and statistics of GP and $\gamma "$ precipitates, made determination of the resistance ${\tau }_p$ to dislocation motion (Peierls stress) of the lattices of these particles possible. The great difference between values measured in these two cases, namely 3.7 GPa for GP and 1.4 GPa for the $\gamma "$ precipitates may be considered as an additional confirmation of the fact that in these two cases the strengthening occurs due to different phases.

基于对厚度为 0.25-6 毫米的铍铜样品进行的三个系列平面冲击试验，铍簇的个别贡献（在淬火过饱和固溶体中），Guinier-Preston 区（GP，在 300°C 时效后形成26 分钟）和亚稳态 $\gamma "$对合金强度的析出物（在 300°C 时效 400 分钟后结晶）和相应的活化体积进行量化。这些数据与 GP 的几何形状和统计数据的透射电子显微镜评估相结合，$\gamma "$ 沉淀，测定电阻 ${\tau }_p$使这些粒子的晶格的位错运动（Peierls 应力）成为可能。在这两种情况下测得的值之间的巨大差异，即 GP 为 3.7 GPa，而 GP 为 1.4 GPa$\gamma "$ 析出物可以被认为是对在这两种情况下由于不同相而发生强化这一事实的额外确认。