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《Materials Science and Technology》 2011-05
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Mechanism of AC arc-ultrasonic on joint of SiC_p/6061Al MMCs

XUE Hou-lu1,LEI Yu-cheng 1 2,HU Wen-xiang1,LIU Zhen-zhen1,YAN Jiu-chun2(1.School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013,China,E-mail:xuehoulu@126.com; 2.State key lab of Advanced welding production Technology,Harbin Institute of Technology,Harbin 150001,China)  
To improve the welding performance of SiCp/6061Al,arc-ultrasonic technology was applied in welding process,and the filling material was Al-15Ti-3Si.The mechanism of arc-ultrasonic on microstructures of joint of SiCp/6061Al MMCs in plasma arc "In-situ" welding with different arc-ultrasonic frequency was investigated.The result shows that the Al3Ti phase is obviously refined by ultrasound.With the frequency 30,50 and 60 kHz,the Al3Ti is crushed to granular or block,and uniformly distributed in the weld.With the frequency 20,40,70 kHz,the Al3Ti is partially crushed,and distributed at the original location along the vertical in the weld.Analysis shows that the arc-ultrasonic impacts the morphology and distribution of Al3Ti mainly by cavitation and acoustic streaming.
【Fund】: 哈尔滨工业大学现代焊接生产技术国家重点实验室开放基金课题(09003);; 江苏科技大学先进焊接技术省级重点开放研究基金课题(JSAWT-09-03);; 江苏大学科技创新团队资助项目(JD0805)
【CateGory Index】: TG456
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