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course of micro-sized non-metallic inclusions in an ultrasonic standing wave field was numerically simulated. The results of theoretical analysis and numerical simulation show that the movement...ULTRASONIC SEPARATION OF MICRO-SIZED INCLUSIONSIN MOLTEN METAL X.Q.Bai1,J.C.He1 (1.Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, NortheasternUniversity......
Effects of ultrasonic vibration on solidification structure and properties of Mg-8Li-3Al alloy YAO Lei, HAO Hai, JI Shou-hua, FANG Can-feng, ZHANG Xing-guo School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China Received 11 June 2010; accepted 5 January 2011 Abstract: Ultrasonic vibration was introduced into the Mg-8Li-3Al alloy melt during......
and rolling preparation technology under the condition of strong outer-field to improve the quality of products[7-8]. In this study, the application of ultrasonic in roll casting of aluminum strips... mechanism of ultrasonic in the process of metal solidification is not very clear at present. There are many factors that affect the ultrasonic roll casting process, such as ultrasonic field, temperature field......
template such as micro-reactor, reducing agent, protector and steric stabilization agent, can be enhanced under special ultrasonic field. This method provides a promising route to prepare metal... method [J]. Journal of Nanjing University, 2002, 38(1): 119-123. [15] LI Yan, YU Hong-ying, SUN Dong-bai. Nano copper powder produced by chemical reduction under ultrasonic field and its influence facts......
of the polymethyl methacrylate(PMMA), polypropylene(PP) and nylon66(PA66) under different process parameters and ultrasound field conditions. The results show that ultrasonic plasticization can... melt increases slightly and changes reversibly. Key words: ultrasound plasticization; polymer; melt mass flow rate; ultrasonic vibration field 微纳制造技术正成为世界关注的焦点.微注射成型因具有低生产成本,高成型精度和易于自动化生产等优点而成为微纳制造关键技......
steel cracking. Quenching with ultrasonic agitation or in the presence of electrical and magnetic fields provide uniform agitation leading to improved uniformity of the stress fields within the metal... cycle to achieve a wide range of cooling profiles not readily achievable with quenchants and more traditional agitation systems currently in use. 关键词:heat treatment; agitation uniformity; ultrasonic......
, an ultrasound field is imposed to the solidifying melt resulting in grain refinement, increased homogeneity, reduced microsegregation as well as degassing [7-9]. Currently, the ultrasonic vibration.... Cavitation refers to the phenomenon of growth and collapse of micro- bubbles under an ultrasonic field. During the growth period, the micro-bubbles expand and the melt evaporates inside the bubbles......
, the undercooling and nucleation will occur in the field of ultrasonic cavitation even the superheat of the alloy is 50 K. And because of the high pressure pulses caused by the ultrasonic cavitation... too high, the more generated heat leads to increase the melt temperature in the field of ultrasonic vibration so that some nuclei remelt. Then the microstructure becomes coarser than......
Crystallization behavior of electroless Co-Ni-B alloy plated in magnetic field in presence of cerium XUAN Tian-peng(宣天鹏), ZHANG Lei(章 磊), HUANG Qin-hua(黄芹华) Institute of Materials Science...: The electrochemical property, chemical composition and crystal structure of electroless Co-Ni-B-Ce alloy plated in general state as well as in magnetic field were studied using potentiometer, plasma......
Microstructural Analysis of Ultrasonic Welded AA6061 by Electron Backscattered Diffraction () 摘要:Ultrasonic welding can be used to join plastic and metal through high-frequency (more than 20 kHz) acoustic vibrations. Aluminium alloy is widely used in electronics, automotive and aerospace. The mechanical vibrations used during ultrasonic metal welding are introduced horizontally. During......