航天器结构材料抗高速碰撞能力的评价

Evaluation of the Capability of Spacecraft Structural Materials Against Hypervelocity impact

研究了LY12－M、LF6、TA6、30CrMnSi-M、30CrMrSi-T受2.6～7km／s高速弹丸GCr15碰撞形成的弹坑体积和弹丸动能之间的线性关系。提出了用材料密度与布氏硬度（ρ.HB）作为评价材料抗高速碰撞能力的标准。材料的ρ.HB值越大，其抗高速碰撞能力越强。在同时考虑抗高速碰撞性能和量要求时选择作为航天器结构材料的优劣次序是TA6、LF6、LY12－M、30CrMnSi－T、30CrMnSi－M。

The linear relations between kinetic energy of projectiles and volumq of cratersformed by hypervelocity impact of a GCr15 projectile at 2.6 ~ 7km/s in LY12M, LF6,TA6, 30CrMnSi -M, 30CrMnSiX alloys was investigated. It is suggested to judge the hypervelocityimpact resistance by Multiplication of the density and Brinell hardness of the alloy(ρ.HB). Thelarger ρ.HB value of a material, the better the impact resistance. With both hypervelocity impactresistance and low density of material as the criferia for material selection,the sequence of thestudied materials for suitubility for use in spacecraft is TA6, LF6, LY12M, 30CrMnSiT,30CrMnSiM.