Plastic deformation size effects in micro-compression of pure nickel with a few grains across diameter
Plastic deformation size effects in micro-compression of pure nickel with a few grains across diameter
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直径上有少量晶粒的纯镍微压缩中的塑性变形尺寸效应
DOI：
10.1016/j.msea.2015.03.087
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发表时间：
2015-06
期刊：
影响因子：
6.4
通讯作者：
Guo Bin
中科院分区：
文献类型：
--
作者：
Wang Chuan-jie;Wang Chun-ju;Xu Jie;Zhang Peng;Shan De-bin;Guo Bin
In microscale, it is hard to predict the plastic deformation behaviors because of size effects. In this study, size effects on plastic deformation behaviors in micro-compression were investigated experimentally at room temperature, including flow stress and inhomogeneous deformation. It is found that the flow stress decreases with the increase of grain size when there are more than 6.2 grains across the specimen diameter. The flow stress tends to increase when there are only 3–4 grains across the specimen diameter. Then, a flow stress size effect model considering both free surface and constrained surface effects is developed to model the flow stress size effect in microforming. The calculated results are in good agreement with experimental ones. The influence of the ratio of specimen diameter to grain size on the flow stress size effect is revealed. The experimental results also indicate that the inhomogeneous deformation in micro-compression increases with the increase of grain size. The surface folding occurs on the surfaces of some specimens with a few grains across the diameter. Then, the surface folding phenomenon is studied through Electron Backscattered Diffraction (EBSD) and the proposed model considering the microstructure distribution on the specimen surface. The reported results and models provide a basis for understanding of the size effects on plastic deformation behaviors in microforming.
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影响因子：
9.4
作者：
Pan, Y;Adams, BL;Panayotou, N
通讯作者：
Panayotou, N
DOI：
10.1115/1.2386207
发表时间：
2007-08-01
影响因子：
4
作者：
Krishnan, Neil;Cao, Jian;Dohda, Kuniaki
通讯作者：
Dohda, Kuniaki
DOI：
10.1016/j.ijmachtools.2006.01.019
发表时间：
2006-09
影响因子：
14
作者：
Stefan Geißdörfer-;U. Engel;M. Geiger
通讯作者：
Stefan Geißdörfer-;U. Engel;M. Geiger
采用均匀尺寸相关材料本构模型分析微/中尺度板材成形过程
DOI：
10.1016/j.msea.2009.06.061
发表时间：
2009-11-25
影响因子：
6.4
作者：
Peng, Linfa;Lai, Xinmin;Ni, Jun
通讯作者：
Ni, Jun
DOI：
10.1115/1.2714582
发表时间：
2007-06-01
影响因子：
4
作者：
Kim, Gap-Yong;Ni, Jun;Koc, Muammer
通讯作者：
Koc, Muammer