Ta-W合金气体炮加载软回收分析

RESEARCH ON THE SOFT RECLAMATION OF TAW ALLOYS UNDER THE GAS GUN LOADING

利用一级气体炮低冲击载荷加载技术，对Ｔａ０５Ｗ和Ｔａ１２Ｗ合金进行了冲击波加载软回收实验，研究了ＴａＷ合金在冲击波加载作用后材料的组织和性能的变化，分析了钨含量、加工状态对ＴａＷ合金动态断裂性能的影响，探讨了在冲击波加载条件下ＴａＷ合金的动态断裂机制。实验结果说明：（１）在冲击载荷作用下，ＴａＷ合金内部发生变形和加工硬化，使材料硬度增加；（２）在相同的冲击载荷作用下，Ｔａ１２Ｗ合金加工态抗冲击波的能力较部分再结晶状态强；（３）在相同的加载条件下，Ｔａ０５Ｗ损伤度轻于Ｔａ１２Ｗ，说明添加的钨元素促进了缺陷的成核与成长过程；（４）在冲击波加载条件下，随钨含量的增加，ＴａＷ合金的动态断裂由延性断裂转变为脆性断裂。

The experiment of the soft reclamation of Ta0.5W and Ta12W alloys under the gas gun loading was carried out by low shock loading in the first gas gunThe varies of microstructures and properties of TaW alloys were investigated after shock loadingThe effect of tungsten content and working condition on dynamic fracture properties of TaW alloys were analysedThe dynamic fracture mechanism of TaW alloys under the shock wave loading was also discussedThe results indicate (1)Under the shock loading,there occur deformation working hardening in TaW alloys Therefore,hardeness is increased(2)Under the same shock loading,the resistance to the shock loading for cold worked specimen is better than recrystallized one(3)Under the same shock loading,the damage degree of Ta0.5W alloy is weaker than Ta12W alloy,which shows that the process of nucleation and growing is accelerated by tungsten addition(4)Under the shock loading,the dynamic fracture of TaW alloys is changed into brittleness from ductility with the tungsten content increasing