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规律

发布时间：2018-03-11 10:41

本文选题：双态组织TC钛合金　切入点：转变β区　出处：《稀有金属材料与工程》2017年08期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:The effect of solution temperature on the volume fraction of transition 尾 region in two-state TC4 titanium alloy was studied, and the split Hopkinson pressure bar was used. The effect of the volume fraction of transition 尾 region on the dynamic compression properties and adiabatic shear sensitivity of two-state TC4 titanium alloy was studied. The results show that the volume fraction of the transition 尾 region increases with the increase of solution temperature. Under the dynamic compression test conditions, the dynamic compressive strength of the alloy increases first and then decreases with the increase of the volume fraction of the transition 尾 region, and the maximum value appears when the volume fraction of the transition 尾 region is 80.7. The plastic strain decreases in turn with the increase of the volume fraction of the transition 尾 region, and the adiabatic shear sensitivity of the alloy increases with the increase of the volume fraction of the transition 尾 region under the experimental conditions of forced shear. The results show that the change of 尾 region volume fraction is 80.7, and the adiabatic shear sensitivity of each TC4 titanium alloy increases with the increase of the initial velocity of the impingement rod with the increase of the initial velocity of the impingement rod, and the lowest value appears when the volume fraction of the transition 尾 region is 80.7.
【作者单位】：北京理工大学冲击环境材料技术重点实验室;
【分类号】：TG146.23

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