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Ceramic Sonotrodes for Light Alloy Melt Treatment
International Journal of Metalcasting ( IF 2.6 ) Pub Date : 2020-05-13 , DOI: 10.1007/s40962-020-00476-5
H. Puga , S. D. Tohidi , V. H. Carneiro , J. Meireles , M. Prokic

Alloy melt treatment by ultrasonic vibration is a physical processing technique that has been gathering the support of the scientific community. The use of metallic sonotrodes for this purpose has been proven very efficient; however, it promotes melt inclusion by sonotrode erosion. Such an issue is being addressed by the use of ceramic sonotrodes in low-amplitude resonance. Given that these novel sonotrodes generally have complex shapes and low displacements, this study shows an innovative approach for their characterization. Based on scanning laser Doppler vibrometry, the signal processing Python-based script was used to map the overall resonant behavior of a tubular SiAlON sonotrode, and this route is able to characterize the complex shapes in low-amplitude and high-frequency radial resonance in resonant ceramic sonotrodes. Velocity time-domain profiles are shown to be dependent on the position, and even though the radial natural frequencies of ceramic sonotrodes have low amplitudes, they are proposed as an efficient tool for melt treatment. While characterizing the radial natural mode in ceramic sonotrodes, this study proves that their low-amplitude Lamb waves are responsible for the refinement of α-grains and secondary phases in light alloys.



中文翻译:

用于轻合金熔体处理的陶瓷超声焊极

通过超声波振动进行合金熔体处理是一种物理处理技术,已经得到了科学界的支持。事实证明,为此目的使用金属超声焊极有效。但是,它会通过超声波发生器腐蚀促进熔体夹杂。通过在低振幅谐振中使用陶瓷超声波探头解决了这一问题。鉴于这些新型超声波焊头通常具有复杂的形状和低位移,本研究显示了一种新颖的表征方法。基于扫描激光多普勒振动计,基于信号的基于Python的脚本用于绘制管状SiAlON超声焊极的整体共振行为,该路线能够表征共振中低振幅和高频径向共振的复杂形状陶瓷超声焊。速度时域轮廓显示为取决于位置,即使陶瓷超声焊极的径向固有频率具有低振幅,它们仍被建议用作熔融处理的有效工具。在表征陶瓷超声焊极的径向自然模式时,这项研究证明了它们的低振幅兰姆波是轻合金中α晶粒和第二相细化的原因。

更新日期:2020-05-13
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