Abstract The accurate determination of the elastic properties is non-trivial for metallic foils. The measured elastic modulus is often described in literature as significantly smaller than the respective modulus of the bulk counterparts. This paper describes a straight forward way to minimize the influence of the measurement on the calculated values using a standard tensile testing device combined with a laser speckle extensometer and advanced data evaluation. The elastic modulus obtained with a monotonic tensile procedure is compared to values obtained from multiple loading–unloading cycles in the elastic regime. The latter were found to lead to more reproducible and reasonable values with significantly smaller standard deviations. To enable interpretation of the modulus values electron backscatter diffraction and X-ray diffraction were used to emphasize the effects of texture and microstructure. Two different electrodeposited copper foils were characterized since copper is widely used in many industrial applications.

中文翻译：

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一种评估金属箔弹性模量的新方法

摘要 准确测定金属箔的弹性性能并非易事。测量的弹性模量通常在文献中描述为显着小于本体对应物的相应模量。本文介绍了一种使用标准拉伸测试设备与激光散斑引伸计和高级数据评估相结合的直接方法，以最大限度地减少测量对计算值的影响。将通过单调拉伸程序获得的弹性模量与在弹性状态下多次加载-卸载循环获得的值进行比较。发现后者导致具有明显更小的标准偏差的更可再现和更合理的值。为了能够解释模量值，使用电子背散射衍射和 X 射线衍射来强调纹理和微观结构的影响。由于铜广泛用于许多工业应用，因此对两种不同的电沉积铜箔进行了表征。