超声振动辅助压缩成形机理

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 25; no. 7; pp. 2352 - 2360
Main Author 庄新村 王家鹏 郑欢 赵震
Format Journal Article
LanguageEnglish
Published 2015
Subjects
压缩
应力叠加
摩擦效应
超声振动
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Bibliography:43-1239/TG
ultrasonic vibration; compression; stress superposition; friction effect
Xin-cun ZHUANG,Jia-peng WANG,Huan ZHENG,Zhen ZHAO（ Institute of Forming Technology and Equipment, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China）
To study the mechanism of ultrasonic vibration assisted forming,the static and vibration assisted compression tests of aluminum 1050 were carried out via a 25 kHz high-frequency ultrasonic vibration device.It is found that vibration reduces the flow resistance and improves the surface topography.The force reduction level is proportional to the ultrasonic vibration amplitude.By using numerical simulation of static and vibration assisted compression tests,the deformation characteristics of material were investigated.Throughout the vibration,the friction between the materials and tools reduces.The stress superposition and friction effects are found to be two major reasons for reducing the force.However,the force reduction because of stress superposition and friction effects is still less than the actual force reduction from the tests,which suggests that softening effect may be one of the other reasons to reduce the force.
ISSN:1003-6326