本文選題：雙態(tài)組織TC鈦合金　切入點：轉(zhuǎn)變β區(qū)　出處：《稀有金屬材料與工程》2017年08期 　論文類型：期刊論文

【摘要】：研究了固溶溫度對雙態(tài)組織TC4鈦合金中轉(zhuǎn)變β區(qū)體積分數(shù)的影響,并利用分離式霍普金森壓桿,進一步研究了轉(zhuǎn)變β區(qū)體積分數(shù)對雙態(tài)組織TC4鈦合金動態(tài)壓縮性能及其絕熱剪切敏感性的影響。結(jié)果表明:隨著固溶溫度的升高,轉(zhuǎn)變β區(qū)的體積分數(shù)隨之增加;在動態(tài)壓縮實驗條件下,合金的動態(tài)抗壓強度隨著轉(zhuǎn)變β區(qū)體積分數(shù)的增加,呈現(xiàn)出先升高后降低的規(guī)律,且在轉(zhuǎn)變β區(qū)體積分數(shù)為80.7%時出現(xiàn)最大值,而塑性應變則隨著轉(zhuǎn)變β區(qū)體積分數(shù)的增加,呈現(xiàn)出依次降低的規(guī)律;在強迫剪切實驗條件下,合金的絕熱剪切敏感性隨著轉(zhuǎn)變β區(qū)體積分數(shù)的增加,呈現(xiàn)出先降低后升高的規(guī)律,且在轉(zhuǎn)變β區(qū)體積分數(shù)為80.7%時出現(xiàn)最低值;且各雙態(tài)組織TC4鈦合金均隨著撞擊桿初速的提高,其絕熱剪切敏感性增加。
[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.
【作者單位】： 北京理工大學沖擊環(huán)境材料技術(shù)重點實驗室;
【分類號】：TG146.23

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