Hydrogen solubility in molten TiAl alloys
Hydrogen solubility in molten TiAl alloys
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DOI：
10.1016/j.ijhydene.2010.05.054
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发表时间：
2010-08
影响因子：
7.2
通讯作者：
Yan-Qing Su;Xinwang Liu;L. Luo;Longmao Zhao;Jingjie Guo;H. Fu
中科院分区：
文献类型：
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作者：
Yan-Qing Su;Xinwang Liu;L. Luo;Longmao Zhao;Jingjie Guo;H. Fu
本文通过理论分析研究了氢在钛铝（TiAl）二元合金熔体中的溶解度，并与实验结果进行了比较。氢溶解度的理论值的确定是基于Sievert定律的修正版本，其中氢溶解度与合金熔体的活度系数和氢在纯液态金属中的溶解度有关。活度系数是根据自由体积理论得到的，其中充分考虑了多余熵。测定了Ti45Al和Ti47Al两种合金熔体中氢溶解度的实验值，验证了计算值。这是用充氢装置进行的。实验值与计算值吻合较好。
In this work, the hydrogen solubility in a titanium–aluminium (TiAl) binary alloy melt was investigated through a theoretical analysis and the results compared subsequently with values determined experimentally. Determination of the theoretical values of hydrogen solubility is based on a modified version of Sievert’s law, in which hydrogen solubility is related to the activity coefficient of the alloy melt and the hydrogen solubility in pure liquid metals. The activity coefficient is obtained in terms of the free volume theory, in which excess entropy is sufficiently taken into account. The experimental values of the hydrogen solubility in the two alloy melts, Ti45Al and Ti47Al, were determined to validate the calculated values. This was performed using hydrogen charging apparatus. The experimental values obtained were in good agreement with the calculated values.