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研究了冷却速率对双态组织TC4钛合金中次生片层α相宽度的影响,并利用分离式霍普金森压杆,进一步研究了次生片层α相宽度对双态组织TC4钛合金动态压缩性能及其绝热剪切敏感性的影响。结果表明:随着冷却速率的降低,次生片层α相宽度随之增加;在动态压缩实验条件下,合金的动态抗压强度随着次生片层α相宽度的增加,呈现逐渐降低的规律,而塑性应变则随着次生片层α相宽度的增加,呈现出逐渐增加的规律;在强迫剪切实验条件下,合金的绝热剪切敏感性随着次生片层α相宽度的增加,呈现出逐渐降低的规律,且各双态组织TC4钛合金均随着撞击杆初速的提高,其绝热剪切敏感性增加。
The effect of cooling rate on the α-phase width of secondary lamellae in TC4 titanium alloy was studied. The effect of the α-phase width of the secondary lamellae on the dynamic properties of the dual-phase TC4 titanium alloy was studied by using split Hopkinson pressure bar Compression performance and its adiabatic shear sensitivity. The results show that with the decrease of cooling rate, the α-phase width of the secondary lamellar increases. Under dynamic compression test, the dynamic compressive strength of the alloy decreases with the increase of α-phase width of the secondary lamellae While the plastic strain shows a law of increasing gradually with the increase of the α-phase width of the secondary lamellar. The adiabatic shear sensitivity of the alloy increases with the α-phase width of the secondary lamellae Increase, showing a gradual decrease in the law, and the TC4 titanium alloy bimodal with the impact of the muzzle velocity increased, the adiabatic shear sensitivity increased.