Deformation-induced grain rotation and growth in nanocrystalline Ni
Deformation-induced grain rotation and growth in nanocrystalline Ni
复制标题
DOI：
10.1063/1.2828699
复制
发表时间：
2008-01-07
影响因子：
4
通讯作者：
Mao, S. X.
中科院分区：
文献类型：
--
作者：
Wang, Y. B.;Li, B. Q.;Mao, S. X.
在透射电镜（TEM）下，利用纳米束电子衍射和一系列暗场成像技术研究了纳米晶（nc） Ni对原位拉伸变形的响应机制。实验显示了单个晶粒轮转和相邻晶粒轮转/生长的完整过程。变形引起的晶粒旋转和生长是数控材料塑性变形机制之一。同时，通过变形试样的原位TEM观察进一步证实了上述结果，物理变形模型也更好地理解了这些结果。
Nanobeam electron diffraction and a series of dark field images techniques were used to investigate the deformation mechanisms of nanocrystalline (nc) Ni in response to in situ tensile deformation under transmission electron microscopy (TEM). The experiments exhibit the complete processes of individual grain rotation and neighboring grain rotation/growth. Deformation-induced grain rotation and growth as one of plastic deformation mechanisms in nc materials was revealed. At the same time, these results were confirmed further by ex situ TEM observation on deformed sample and were also better understood by physical deformation model.