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Effect of Hot Work on Stress Rupture Properties of Electron Beam Welds of Ti-24Al-15Nb-1.5Mo/TC11 Dual-Alloy
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Effect of Hot Work on Stress Rupture Properties of Electron Beam Welds of Ti-24Al-15Nb-1.5Mo/TC11 Dual-Alloy
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    摘要:

    研究了熱變形對Ti-24Al-15Nb-1.5Mo/TC11雙合金焊接界面持久性能的影響。在梯度熱處理?xiàng)l件下，變形量為40%的試樣持久壽命優(yōu)于其他試樣。在持久試驗(yàn)過程中，焊縫以及合金的熱影響區(qū)是薄弱區(qū)域，斷裂多發(fā)生在此。當(dāng)焊縫以及合金熱影響區(qū)中含有晶界α相時(shí)會降低持久性能；同時(shí)，Ti-24Al-15Nb-1.5Mo合金基體中的粗大α2相也是導(dǎo)致持久性能降低的不利因素。由于在持久試驗(yàn)過程中元素繼續(xù)擴(kuò)散，可以發(fā)現(xiàn)持久試驗(yàn)后Nb元素在焊縫中的含量明顯增加

    Abstract:

    The effect of hot working conditions on the stress rupture properties of Ti-24Al-15Nb-1.5Mo/TC11 dual-alloy with electron beam welds has been evaluated. Under the gradient heat treatment, the stress rupture properties of the dissimilar alloy joints with 40% deformation degree are superior to the others. The weld and heat affected zone (HAZ) are the weak areas in the stress rupture experiment. The microstructures of weld and HAZ containing grain boundary α are not beneficial to the stress rupture property. Meanwhile, the grain boundaries of Ti-24Al-15Nb-1.5Mo base alloy with coarse α2 phases have a negative effect to stress rupture property. As the atoms diffusing, the content of Nb increases obviously in the weld after stress rupture experiment.

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秦 春,姚澤坤,張東亞,寧永權(quán),郭鴻鎮(zhèn),趙張龍. Effect of Hot Work on Stress Rupture Properties of Electron Beam Welds of Ti-24Al-15Nb-1.5Mo/TC11 Dual-Alloy[J].稀有金屬材料與工程,2013,42(11):2207~2011.[Qin Chun, Yao Zekun, Zhang Dongya, Ning Yongquan, Guo Hongzhen, Zhao Zhanglong. Effect of Hot Work on Stress Rupture Properties of Electron Beam Welds of Ti-24Al-15Nb-1.5Mo/TC11 Dual-Alloy[J]. Rare Metal Materials and Engineering,2013,42(11):2207~2011.]
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  • 收稿日期:2012-11-13
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