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A quantitative experimental study on non-homogenous deformation behaviors of nanocrystalline Ni sheet

机译：纳米晶镍薄板非均匀变形行为的定量实验研究

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摘要

A quantitative experimental study on the non-homogenous plastic deformation of fully dense electro-deposited nanocrystalline Ni sheet under a quasi-static uniaxial tensile load was carried out in this paper. The sheet sample exhibited high strength simultaneously with a decrease in tensile strain. To investigate the early failure of the nanocrystalline Ni, the strain fields was quantified with digital image correlation algorithm. Based on the experimental results, the non-homogenous in form of shear bands was analyzed. Some critical points, such as shear band nucleation, broadening process and failure point were recognized. Then the inclination and width of full-developed shear band were discussed quantitatively. Finally, the failure mode, deformation mechanism and some impact factors on the non-homogenous deformation were discussed in detail.
机译：本文对准致密单轴拉伸载荷下全致密电沉积纳米晶镍片的非均匀塑性变形进行了定量实验研究。片状样品同时显示出高强度和拉伸应变的降低。为了研究纳米晶镍的早期失效，用数字图像相关算法对应变场进行了量化。根据实验结果，对剪切带形式的非均质材料进行了分析。认识到一些关键点，例如剪切带成核，扩展过程和破坏点。然后定量讨论了完全展开的剪切带的倾角和宽度。最后，详细讨论了非均匀变形的破坏方式，变形机理及一些影响因素。

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