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研究了固溶温度对双态组织TC4钛合金中转变β区体积分数的影响,并利用分离式霍普金森压杆,进一步研究了转变β区体积分数对双态组织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:随着固溶温度的升高,转变β区的体积分数随之增加;在动态压缩实验条件下,合金的动态抗压强度随着转变β区体积分数的增加,呈现出先升高后降低的规律,且在转变β区体积分数为80.7%时出现最大值,而塑性应变则随着转变β区体积分数的增加,呈现出依次降低的规律;在强迫剪切实验条件下,合金的绝热剪切敏感性随着转变β区体积分数的增加,呈现出先降低后升高的规律,且在转变β区体积分数为80.7%时出现最低值;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 effects of solution temperature on the volume fraction of β domain in TC4 titanium alloy were studied. The effect of transformation β volume fraction on the dynamic compressibility of TC4 titanium alloy with dual microstructure and Its adiabatic shear sensitivity. The results show that with the increase of solution temperature, the volume fraction of transition β increases. Under dynamic compression test, the dynamic compressive strength of the alloy increases with the increase of volume fraction of β region, , And the maximum value appears when the volume fraction of β region changes is 80.7%, while the plastic strain shows the order of decreasing with the increase of volume fraction of β region. Under the condition of forced shear test, The adiabatic shear susceptibility decreases first and then increases with the increase of the volume fraction of β region, and reaches the lowest value when the volume fraction of β region is changed to 80.7%. The TC4 titanium alloys of all binary states Impact of the initial velocity of the rod, the adiabatic shear sensitivity increased.