Tensile and microbend tests of pure aluminum foils with different thicknesses
Tensile and microbend tests of pure aluminum foils with different thicknesses
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DOI：
10.1016/j.msea.2009.01.045
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发表时间：
2009-07
期刊：
影响因子：
6.4
通讯作者：
Katsuya Suzuki;Y. Matsuki;Koichi Masaki;Masumi Sato;M. Kuroda
中科院分区：
文献类型：
--
作者：
Katsuya Suzuki;Y. Matsuki;Koichi Masaki;Masumi Sato;M. Kuroda
对具有相同微观结构但厚度不同的多晶纯铝箔进行了一系列系统的拉伸和微弯试验。通过电解抛光改变厚度。随着箔厚度的减小，在拉伸试验中观察到屈服强度的增加，而在微弯试验中，发生表观应变硬化模量的增加。微弯试验的数值模拟进行使用高阶梯度晶体塑性理论，占由于几何必要的位错的内应力的影响。在微弯试验中观察到的趋势在模拟中合理地再现。
A series of systematic tensile and microbend tests was conducted on polycrystalline pure aluminum foils having the same microstructure but with different thicknesses. The thickness was changed by electropolishing. With the reduction of the foil thickness, an increase in yield strength was observed in the tensile tests, while in the microbend tests, an increase in the apparent strain-hardening modulus occurred. Numerical simulations of the microbend tests are performed using a higher-order gradient crystal plasticity theory that accounts for the effect of internal stresses due to the geometrically necessary dislocations. The trend observed in the microbend tests is reasonably reproduced in the simulations.