Study on Titanium Alloy TC4 Ballistic Penetration Resistance Part I:Ballistic Impact Tests  

作　　者：ZHANG Tao CHEN Wei GUAN Yupu GAO Deping 

机构地区：[1]College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics Nanjing 210016,China

出　　处：《Chinese Journal of Aeronautics》2012年第3期388-395,共8页中国航空学报（英文版）

摘　　要：Ballistic impact test of different-scale casings is an efficient way to demonstrate the casing containment capability at the preliminary design stage of the engine. For the sake of studying the titanium alloy TC4 casing perfonnance, the ballistic tests of flat and curved simulation casing are implemented by using two flat blades of different sizes as the projectile. The impact mechanism and failure of the target are discussed. Impact of the projectile is a highly nonlinear transient process with the large deformation of the target. On the impact, failures of the flat casing and the subscale casing are similar, concluding two parts, the global dish- ing and localized ductile tearing. The main localized failure mode combines plugging （shear） and petaling （shear） if the projectile perforates or penetrates, while crater （shear） if the projectile rebounds. The ballistic limit equation is verified by the test data and the results show that this empirical equation could be a practical way to estimate the critical velocity.Ballistic impact test of different-scale casings is an efficient way to demonstrate the casing containment capability at the preliminary design stage of the engine. For the sake of studying the titanium alloy TC4 casing perfonnance, the ballistic tests of flat and curved simulation casing are implemented by using two flat blades of different sizes as the projectile. The impact mechanism and failure of the target are discussed. Impact of the projectile is a highly nonlinear transient process with the large deformation of the target. On the impact, failures of the flat casing and the subscale casing are similar, concluding two parts, the global dish- ing and localized ductile tearing. The main localized failure mode combines plugging （shear） and petaling （shear） if the projectile perforates or penetrates, while crater （shear） if the projectile rebounds. The ballistic limit equation is verified by the test data and the results show that this empirical equation could be a practical way to estimate the critical velocity.

关 键 词：CONTAINMENT CASING ballistic penetration damage mechanism failure mode 

分 类 号：TG115.56[金属学及工艺—物理冶金] V261.23[金属学及工艺—金属学]