论文名称：Analysis on elemental volatilization behavior of titanium alloys during electron beam smelting
论文类型：期刊论文
发表刊物：VACUUM
收录刊物：SCIE
卷号：157
页面范围：395-401
ISSN号：0042-207X
关键字：Titanium alloys; Electron beam smelting; Elemental volatilization; Kinetics; Composition control
摘要：Electron beam smelting is an effective technology for removal of inclusions from titanium alloys and improvement of metallurgical quality. However, since different element has different volatilization capacity, resulting in a large deviation in alloy composition, which affects the performance of titanium alloys. In this paper, the volatility trend of the components in a Ti-Al-Cr-Nb quaternary model alloy was evaluated and a calculation model for alloy composition change was established based on Langmuir's volatilization rate theory. The results show that, for the other three elements in the alloy, the order of relative volatility coefficient is Al > Cr > Nb. The mass fraction of Al in the alloy will be significantly reduced after smelting, which plays an important role in control of alloy composition. The effect of temperature on the change of alloy composition is greater than that of smelting time. When the temperature is over 2100 K, the composition changes too much in a very short time. The experimental results are consistent with the theoretical results, indicating the applicability of the model.
发表时间：2018-11-01