Evaporation tendency of components in Ti-6Al-4V alloy melt

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作者：
Sch. of Mat. Sci., Harbin Inst. of Technol., Harbin 150001, China [1 ]
机构：
来源：
Cailiao Kexue yu Gongyi/Material Science and Technology | 2001年 / 9卷 / 02期
关键词：
Aluminum alloys - Composition - Evaporation - Liquid metals - Vanadium alloys;
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摘要：
Based on a model of the activity coefficient of the components in a melt that was established by the authors earlier, the activity coefficient and the saturation pressure of components in Ti-6Al-4V melt were calculated. Using the calculated data of the activity coefficient and the saturation pressure, the relative evaporation coefficient β has been deduced to judge the evaporation tendency of these components. When the temperature is less than 2000 K, the relative evaporation coefficient of Al and Ti is: β(Al:Ti)>17, the relative evaporation coefficient of Al and V is: β(Al:V)>96, and the relative evaporation coefficient of Ti and V is: β (Ti:V)>5. This shows that the evaporation tendency of the elements is as follows: Al>T>V, which means that the composition deviation during the melting process is mainly caused by the evaporation loss of component Al.
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页码：175 / 177
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