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ultrasonic scanning device and a high frequency probe[3]. It is reported that ration of the rate of longitudinal wave reflection to the rate of shear wave reflection has been used to judge the quality of joint... is an effective testing method too. The frequency analysis, guided wave and wavelet etc have been used to study the ultrasonic feature of bonding titanium plate[9], ultrasonic propagation mechanics......
strengthen when more power is applied. REFERENCES [1]Tsujino J, Yoshihara H, Kamimoto K, et al. Welding characteristics and temperature rise of high frequency and complex vibration ultrasonic wire... of removal of micron-sized particles by high-frequency ultrasonic waves [J]. IEEE Transaction on Ultrasonics, Perroelectrics, and Frequency Control, 1995, 42(4): 619-629. (Edited by LI Xiang-qun) Foundation......
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Effect of ultrasonic stirring on temperature distribution and grain refinement in Al-1.65%Si alloy melt LI Jun-wen(李军文)1, 2, T. Momono3, FU Ying(付 莹)1, JIA Zheng(贾 征)1, Y. Tayu3 1. College... to study the formation of grain refining structure with ultrasonic stirring. The cooling curves of ingots with ultrasonic were measured and compared with those without ultrasonic. At the same time......
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(Hopt) corresponding to a certain ultrasonic power boasts best strengthening effect. Meanwhile, Hopt is related to the selection of heating temperature, ultrasonic power and frequency. As ultrasonic... by ARS and improve the refrigeration performance. 2) As the ultrasonic transducer has a fixed- frequency in the experiment, the author failed to study the impact of ultrasonic frequencies on the mass......
source which can be adjusted from audio frequency to several hundred thousand Hertz is designed successfully. The ultrasonic exciting source is coupled with conventional DC spraying power supply...Ultrasonic Plasma Spray--A New Plasma Spray Process WEN Xiong-wei1,LI Lu-ming1,ZHANG Hua-tang1,LU Zhi-qing1 (1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China) 摘要......
. The experimental ultrasonic power was 2 kW (adjustable) and its frequency was 20 kHz. The diameter of aluminum alloy ingot was 300 mm. The casting length was 2 m. The thermocouple was placed at 75 mm away...; Effect of ultrasonic power and casting speed on solidification structure......
the model to analyze the ultrasonic grinding force. The result of the above-mentioned law shows that the grinding force decreases as frequency and amplitude increase, while increases as grinding depth... for the decrease of grinding force. The study showed that grinding force decreased with the increase of ultrasonic frequency, but it decreased slowly when the frequency exceeded a certain value......
the schematic diagram of the formation of composite bonds. The ultrasonic vibration with 20 μm amplitude and a frequency of 20 kHz were applied for 1 s when samples were heated up to 420 ℃. After... Ultrasonic dissolution of brazing of 55% SiCp/A356 composites ZHANG Yang(张 洋), YAN Jiu-chun(闫久春), CHEN Xiao-guang(陈晓光), CUI Yan(崔 岩) State Key Laboratory of Advanced Welding Production Technology......
