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首页> 外文会议>World conference on titanium >Density, Thermal Expansion and Surface Tension of Liquid Titanium Alloys Measured by Non-Contact Techniques
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Density, Thermal Expansion and Surface Tension of Liquid Titanium Alloys Measured by Non-Contact Techniques

机译：通过非接触技术测量的液体钛合金的密度，热膨胀和表面张力

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Due to the high temperatures involved and the high affinity of Ti for oxygen, determining the thermo-physical properties of liquid titanium and its alloys is a difficult experimental task. One way out of this difficulty is the use of electromagnetic levitation. This technique allows containerless positioning and heating of metallic samples by high frequency, inhomogeneous electromagnetic fields. In combination with non-contact diagnostic tools such as pyrometry and videometry, the thermo-physical properties of liquid titanium alloys can be measured over a wide temperature range, including the undercooled regime. For density measurements, a shadowgraph technique, using illumination of the sample by a laser, was used. Surface tension data were obtained by means of the oscillating drop technique from the frequencies of surface oscillations of levitated drops. These containerless methods have been applied to two important types of alloy, namely Ti-6wt%Al-4wt%V and Ti-44at%Al-8at%Nb-1at%B. A description of the methods, as well as results of the measurements, is presented.
机译：由于所涉及的高温和Ti的高亲和力，确定液体钛的热物理性质及其合金是难度的实验任务。出于这种困难的一种方式是使用电磁悬浮。该技术允许通过高频，非均匀电磁场进行容器定位和加热金属样品。结合非接触式诊断工具，例如高温测定和videometry，可以在宽温度范围内测量液体钛合金的热物理性质，包括过冷的状态。对于密度测量，使用了使用激光照射样品的吸影技术。通过从悬浮液体表面振荡的频率的振荡液化技术获得表面张力数据。这些容器方法已应用于两个重要类型的合金，即Ti-6wt％Al-4wt％V和Ti-44at％Al-8At％Nb-1At％b。提出了方法的描述，以及测量结果。

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