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. The experimental apparatus for ultrasonic treatment is shown in Fig.1. The semi-continuous casting system Table 1 Chemical composition of A280 magnesium alloy (mass fraction, %) Fig.1 Schematic diagram.... For convenience, vibration treatment without ultrasonic is defined as 0 W ultrasonic treatment. The specimens for macro- and micro-observation were taken from different locations of cross-section in the billets......
and mechanical properties of Mg-6Zn-0.5Y magnesium alloy was investigated.The results show that ultrasonic treatment can significantly modify the as-cast microstructure of Mg-6Zn-0.5Y alloy.With the application of ultrasonic treatment,the primary a-Mg phase transforms from coarse dendrites to nearly fine equiaxed grains,and the continuous I-phase atα-Mg boundaries is modified into discontinuous......
Influence of high-intensity ultrasonic treatment on the phase morphology of a Mg-9.0wt.%Al binary alloyZHANG Zhiqiang, LE Qichi, and CUI Jianzhong Key Laboratory of the Ministry of Education of China for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China摘 要:The effect of ultrasonic treatment on the β-phase (Mg17Al12......
: Science, 2012, 17: 456–460. DOI: 10.1007/s12204-012- 1305-x. [17] DUTTA R K, PETROV R H, DELHEZ R, HERMANS M, RICHARDSON I M, BOTTGER A J. The effect of tensile deformation by in situ ultrasonic treatment... J. Cent. South Univ. (2018) 25: 1545-1559 DOI: https://doi.org/10.1007/s11771-018-3847-z Effects of ultrasonic vibration on performance and microstructure of AZ31 magnesium alloy under tensile......
, ultrasonic technology was applied in the processes of pre-treatment and electrodeposition. The phases of pre-treatment layer and the nickel coating were analyzed by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS), and the microstructure was observed by scanning electron microscopy (SEM). Then, the effects of ultrasonic dispersion on the microstructure of pre-treatment layer......
]. Metallurgical Transactions, 1989, 20B(8): 623-629. [5] ESKIN G I. Broad prospects for commercial application of the ultrasonic (cavitation) melt treatment of light alloys [J]. Ultrason Sonochem, 2001, 8(3... temperature: China ZL03133390.7[P], 2003. (in Chinese) [8] ZHANG Zhi-qiang, LE Qi-chi, CUI Jian-zhong. Ultrasonic treatment of magnesium alloy melts and its effects on solidification microstructure [J......
Metallurgica Sinica, 2009, 45(3): 314?319. (in Chinese) [9] FENG H K, YU S R, LI Y L, GONG L Y. Effect of ultrasonic treatment on microstructures of hypereutectic Al-Si alloy [J]. Journal... treatment [J]. Materials & Design, 2007, 18(4): 323?326. [11] ZHONG G, WU S S, JIANG H, AN P. Effects of ultrasonic vibration on the iron-containing intermetallic compounds of high silicon......
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Surface grain refinement mechanism of SMA490BW steel cross joints by ultrasonic impact treatmentBo-lin He,Lei Xiong,Ming-ming Jiang,Ying-xia Yu,Li LiSchool of Mechanical & Electronic Engineering,East China Jiaotong University摘 要:Ultrasonic impact treatment(UIT) is a postweld technique for improving the fatigue strength of welded joints. This technique......
the power is 170 W, and the refining effect also gets better with prolonging the ultrasonic treatment time. The corrosion resistance of the alloy with 170 W of ultrasonic vibration for 90 s is improved... of alloy improve by 9.5% and 45.7%, respectively, with 170 W of ultrasonic treatment for 90 s. Key words: Mg-8Li-3Al alloy; ultrasonic vibration; corrosion resistance 1 Introduction Mg-Li series alloys......
