爆炸加载下钨合金的断裂特性

FRACTURE BEHAVIOUR OF TUNGSTEN ALLOY AT HIGH RATES OF STRAIN BY EXPLOSIVE LOADING

用微量炸药接触爆炸的方法，研究了钨合金９３Ｗ─４Ｎｉ─３Ｆｅ在高加载率条件下的断裂特性，通过宏、微观观察，以及与静态断裂特性相比较，发现随着加载率的增加，钨─钨界面裂纹增加，致使钨合金的断口呈脆性状态。

A contact explosion technique is developed using PETN compact powder explosive to study the fracture behaviour of 93W-4Ni3Fe W alloy at high strain rates. The fractograph exhibits a strong feature of brittle type. This fact is because of greater increase in W-W fracture interface at high loading rates in comparison with the existing results in quasi-static test.