Effect of Deformation Induced Microstructure Faults on the Elastic Mechanical Parameters of Micro-Scale Copper
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The elastic mechanical parameters of initial and pre-twisted copper wires were investigated with the aid of a self-developed micro-torsion tester. It was found that the apparent elastic shear modulus and the apparent Young tensile modulus of the copper wires decrease by 13.3 and 8.4% after pre-twist deformation, respectively. In addition, the indentation modulus also decreases as the deformation is increased. When the deformation is more than 30%, the indentation modulus of pre-twisted copper wires is smaller than that of initial copper wires. Microstructural analyses show that the elastic modulus decreases with the proportion of faults.
KeywordsMicro-scale Apparent elastic shear modulus Apparent Young tensile modulus Nanoindentation
This work is supported by the National Natural Science Foundation of China (Grant Nos. 11372323), and CAS Key Technology Talent Program and the project of function development on scientific instruments of Chinese Academy of Sciences.
- 8.Dai YJ, Huan Y, Gao M, Dong J, Liu W, Pan MX, Wang WH, Bi ZL (2015) Development of a high-resolution micro-torsion tester for measuring the shear modulus of metallic glass fibers. Meas Sci Technol 26Google Scholar
- 9.Huan Y, Dai YJ, Shao YQ, Peng GJ, Feng YH, Zhang TH (2014) A novel torsion testing technique for micro-scale specimens based on electromagnetism. Rev Sci Instrum 85Google Scholar
- 11.Tsuchiya T, Shikida M, Sato K (2002) Tensile testing system for sub-micrometer thick films. Sens Actuators, A 97-8(492–496)Google Scholar
- 14.You L, Song XP, Lin Z, Zhang B (2007) Measurement study for elastic modulus of metal wires. Rare Met Mater Eng 36(10):1776–1779Google Scholar