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Ti55鈦合金的熱壓縮變形及其本構(gòu)方程
發(fā)布人：上海艾荔艾金屬材料有限公司www.85978597.cn
更新時(shí)間：2015-09-13
采用Gleebe-3800熱模擬實(shí)驗(yàn)在變形溫度900~960 ℃、應(yīng)變速率為0.001~10 s-1條件下進(jìn)行Ti55鈦合金的熱壓縮變形實(shí)驗(yàn)。
Ti55鈦合金的熱壓縮變形及其本構(gòu)方程Hot compression deformation and its constitutive equation of Ti55 alloy
采用Gleebe-3800熱模擬實(shí)驗(yàn)在變形溫度900~960 ℃、應(yīng)變速率為0.001~10 s-1條件下進(jìn)行Ti55鈦合金的熱壓縮變形實(shí)驗(yàn)。結(jié)果表明：Ti55鈦合金的熱壓縮真應(yīng)力—應(yīng)變曲線表現(xiàn)為流變軟化的特點(diǎn)，當(dāng)變形溫度降低或應(yīng)變速率增加時(shí)，Ti55鈦合金的流變應(yīng)力也隨之增加。通過對(duì)真應(yīng)力—應(yīng)變曲線的回歸分析，建立了Ti55鈦合金的流變應(yīng)力本構(gòu)方程，在本研究中的變形溫度與應(yīng)變速率下，Ti55鈦合金的Zener-Hollomon參數(shù)Z= exp[3.926 7×105/(RT)] =A[sinh(5.107 5×105σ)]4.001 46。
The hot compression deformation behavior of Ti55 alloy was investigated by hot compression testing on Gleeble-3800 thermal simulator at the temperature range of 900-960 ℃ with the strain rate varying from 0.001 s-1to 10 s-1. The results indicate that the true stress—strain curves of Ti55 titanium alloy during hot compression show rheological softening characteristics. The flow stress increases when the deformation temperature decreases or the strain rate increases. Through the true stress—strain curve regression analysis, the flow stress constitutive equations of Ti55 titanium alloy is built and the Zener-Hollomon parameter of this alloy is Z= exp[3.926 7×105/(RT)] =A[sinh(5.107 5×105σ)]4.001 46.
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