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Influence of hydrogen content on hot deformation behavior and microstructural evolution of Ti600 alloy

机译：氢含量对Ti600合金热变形行为和组织演变的影响

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Isothermal hot compression tests of a Ti600 alloy after hydrogenation were carried out over the temperature range of 760 to 880℃ and strain rate range of 0.01 to 10 s-1. The influence of hydrogen content was studied on the flow stress and activation energy of deformation. The microstructural changes were examined by transmission electron microscopy (TEM). The results show that the addition of 0.3% hydrogen in Ti600 alloy can decrease the hot deformation temperature by 80 ◦C and increase the deformation strain rate by two orders of magnitude. Both the flow stress and activation energy of deformation of Ti600 alloy decrease gradually with increasing hydrogen content in the hydrogen range of 0 to 0.3%. TEM observation suggests that dynamic recrystallization (DRX) is promoted after hydrogenation. Hydrides δ (fcc structure) exist in the specimens with 0.3% and 0.5% hydrogen, and the hydrides tend to be broken up and twisted with increasing hydrogen content after deformation. The mechanism of hydrogen reduced flow stress of Ti600 alloy has been discussed in detail.
机译：在760至880℃的温度范围和0.01至10 s-1的应变率范围内对氢化后的Ti600合金进行等温热压缩试验。研究了氢含量对流动应力和变形活化能的影响。通过透射电子显微镜（TEM）检查微观结构变化。结果表明，在Ti600合金中添加0.3％的氢可以使热变形温度降低80℃，并使变形应变率提高两个数量级。 Ti600合金的流动应力和变形活化能都随着氢含量的增加而逐渐降低，氢含量在0％到0.3％之间。 TEM观察表明，氢化后促进了动态重结晶（DRX）。氢含量为0.3％和0.5％的试样中存在氢化物δ（fcc结构），并且随着变形后氢含量的增加，氢化物易于分解和扭曲。详细讨论了氢降低Ti600合金流动应力的机理。

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