(北京航空材料研究院，中國航空發(fā)動機集團先進鈦合金重點實驗室，北京 100095)
摘 要: 實驗采用底推式105 mm穿甲模擬彈，測試雙態(tài)組織TC32鈦合金靶板的抗彈性能，并采用光學顯微鏡和掃描電鏡研究靶板的損傷機制。結(jié)果表明：雙態(tài)組織TC32鈦合金靶板的防護系數(shù)達1.91以上；在開坑階段，TC32鈦合金靶板主要是以崩落和發(fā)生絕熱剪切的損傷機制產(chǎn)生破壞；在穩(wěn)定侵徹階段和侵徹后期，TC32鈦合金靶板主要是以發(fā)生絕熱剪切、裂紋、塑性變形的損傷機制產(chǎn)生破壞。雙態(tài)組織類型的TC32鈦合金具有優(yōu)良的強韌性匹配，抗彈性能優(yōu)異。
關(guān)鍵字: TC32鈦合金；靶板；抗彈性能；損傷機制；絕熱剪切帶
（Key Laboratory of Advanced Titanium Alloys, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, 100095, China）
Abstract:The ballistic properties of bimodal microstructure of TC32 titanium alloy armor plate were tested by using 105 simulated armor piercing(AP) ammunition, and failure mechanisms of the armor plate were studied by using optical microscope(OM) and scanning electron microscope (SEM). The results show that the value of protection coefficient exceeds 1.91. At cratering stage, the main failure mechanisms of TC32 titanium alloy armor plate are avalanche and adiabatic shear bands(ASBs) that leads to the armor plate damaged. At steady penetrating stage and end of penetrating stage, various types of adiabatic shear bands(ASBs), cracks, and plastic deformation phenomenon are the main failure mechanisms in titanium armor plate. The TC32 titanium alloy armor plate with bimodal microstructure has more excellent matching properties of strength and toughness, which results in better ballistic properties.
Key words: TC32 titanium alloy; armor plate; ballistic properties; failure mechanism; adiabatic shear bands
