Shear banding during cyclic deformation of sub-microcrystalline nickel
Shear banding during cyclic deformation of sub-microcrystalline nickel
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亚微晶镍循环变形过程中的剪切带
DOI：
10.1016/j.scriptamat.2010.02.010
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发表时间：
2010
影响因子：
6
通讯作者：
W. Skrotzki
中科院分区：
文献类型：
--
作者：
S. Dey;L. Hollang;B. Beausir;E. Hieckmann;W. Skrotzki
研究了在高塑性应变幅值循环变形条件下脉冲电沉积制备的亚微晶镍。经过一定次数的加载循环后，试件在与拉伸轴45°方向上形成了一个“宏观”剪切带，这是裂纹的引发剂。电子背散射衍射显示剪切带由沿剪切面拉长的松弛晶粒组成，呈现出典型的剪切织构。采用{111}< 110 >滑移体系的粘塑性自洽多晶模型再现剪切带织构。
Sub-microcrystalline nickel produced by pulsed electrodeposition was investigated during cyclic deformation at high plastic strain amplitude. After a certain number of loading cycles the specimen developed a “macro” shear band at 45° with respect to the tensile axis, which acted as a crack initiator. Electron backscatter diffraction revealed that the shear band consists of relaxed grains elongated along the shear plane, showing a typical shear texture. The shear band texture was reproduced with the viscoplastic self-consistent polycrystal model using {111}〈110〉 slip systems.