不全位错

综述了纳米面心立方金属的变形机制随晶粒尺寸的减小而发生的变化，即变形机制由晶界处发射不全位错、形成孪晶转变为晶界滑移、晶粒转动。

As the grain sizes are decreased , the transition of deformation mechanism from partial dislocation emission from grain boundaries and twinning to grain boundary sliding and grain rotation in face-centered-cubic nano-crystalline metals is summarized .

纳米多晶铝和铜的塑性变形机制也略有不同，在纳米多晶铝中观察到了不全位错，全位错和形变孪晶，而在纳米多晶铜中却只有不全位错。

The mechanisms of plastic deformation for nc copper and aluminum are also different slightly , that is to say , we have observed partial dislocations , full dislocations and deformation twins in nc aluminum , but only partial dislocations are observed in nc copper .

所得的X射线透射劳埃图上大部分斑点分别分布在四条主晶带上，经分析发现，该金刚石晶体主要的晶体缺陷为位错，并推导出晶体内部存在Frank不全位错。

Most of those diffraction spots on the Laue X-ray pattern of the synthetic diamond are distributed on four main crystal zones respectively . The main type of crystal defects in this sample are dislocations , and some of them belong to the Frank type .

在一些含缺陷界面的变形过程中，观察到了不全位错的萌生。

In some cases of a defective interface , the nucleation of partial dislocations is observed .

当变形机制为晶界处发射不全位错、形成孪晶时，存在最佳孪晶形成晶粒尺寸范围，此时的孪晶形核应力最小。

There is a optimum twinning grain size range with minimum critical stress for twin nucleation when partial dislocations emit from grain boundaries and twinning is the main deformation mechanism .