Transactions of Materials and Heat Treatment

Title：Compression deformation behavior and size effect of copper under low-frequency vibration

Authors： Li Pan Wang Xinyun Zhang Mao Deng Lei Jin Junsong Xia Juchen

Unit： Huazhong University of Science and Technology

KeyWords： vibration with low frequency compression deformation copper T2 size effect superposition of stress grain refinement

ClassificationCode：TG311

year,vol(issue):pagenumber：2017,42(8):140-145

Abstract：

The influences of amplitude（0.01，0.05 and 0.1 mm）, frequency (10, 20 and 30 Hz), feeding rate (0.01, 0.05 and 0.1 mm·s-1) and specimen size (Ф1，Ф2 and Ф3 mm) on the room-temperature compression deformation behavior of copper T2 were experimentally investigated by changing low-frequency vibration loading. The results reveal that the vibration amplitude plays the most significant role in the compression deformation of copper, and the forming load is effectively reduced with the increase of vibration amplitude. It also shows strong evidence of size effects during low-frequency vibration loading by experiment of different specimen sizes. The smaller the sample size is, the greater the forming load reduces and the smaller the grain size is. It is concluded that the deformation under vibration condition is dynamic loading, and the superposition of stress leads to the increase of internal stress and the reduction of required forming load. Under the condition of large amplitude or small size, the actual strain rate becomes greater, which enhances the superposition of stress and reduces forming load greatly.

Funds：

国家自然科学基金资助项目（51175202）；湖北省科技支撑计划项目（2015BAA019）；深圳市基础研究计划项目（201605313001169）

李盼（1993-），女，硕士研究生邓磊（1982-），男，博士，讲师

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