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氫對Ti-6Al-4V合金微觀組織的影響
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Effect of Hydrogen on Microstructure of Ti-6Al-4V Alloys
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Supported by “973” Project; National Natural Science Foundation of China (50371068); NPU-FFR-006

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    摘要:

    采用累計流量法對供應態(tài)Ti-6Al-4V合金進行了固態(tài)置氫，運用OM、XRD、TEM分析等方法研究了Ti-6Al-4V合金固態(tài)置氫后的微觀組織狀態(tài)及演變過程。結果表明：供應態(tài)Ti-6Al-4V合金的置氫量低于0.30%(質量分數(shù)，下同)時，置氫使得Ti-6Al-4V合金中的α相減少、β相增加；置氫量達到0.30%時，置氫Ti-6Al-4V合金中有δ氫化物（TiH2相）形成；β-Ti（H）共析轉變生成α-Ti和δ氫化物時主要以切變方式進行；置氫Ti-6Al-4V合金的相變溫度最多下降了180 °C，與Ti-6Al-4V合金在置氫過程中的相體積比變化和共析轉變有密切關系。

    Abstract:

    Hydrogenation of Ti-6Al-4V titanium alloys was carried out in a special furnace through the accumulated flux method, and OM, XRD and TEM techniques were used to investigate the microstructure evolution of the hydrogenated Ti-6Al-4V titanium alloy. The hydrogenation of the Ti-6Al-4V titanium alloy with the hydrogen content of 0.30 wt% makes the α phase fraction decrease compared with that of the as-received Ti-6Al-4V titanium alloy, but it makes the β phase fraction increase. The δ hydride (TiH2 phase) occurs in the hydrogenated Ti-6Al-4V titanium alloy when the hydrogen content is more than 0.3 wt%. The shear deformation is main pattern in the transformation processes from β-Ti(H) phase to α-Ti phase and δ hydride (TiH2 phase). The phase transformation temperature of the hydrogenated Ti-6Al-4V titanium alloy decreases by 180 °C compared with that of the as-received Ti-6Al-4V titanium alloy, and it is related to the phase fraction and phase transformation.

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李淼泉,張偉福,朱堂葵,侯宏亮,李志強.氫對Ti-6Al-4V合金微觀組織的影響[J].稀有金屬材料與工程,2010,39(1):1~5.[Li Miaoquan, Zhang Weifu, Zhu Tangkui, Hou Hongliang, Li Zhiqiang. Effect of Hydrogen on Microstructure of Ti-6Al-4V Alloys[J]. Rare Metal Materials and Engineering,2010,39(1):1~5.]
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  • 收稿日期:2009-01-15
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