On the origin of dislocations
On the origin of dislocations
复制标题
DOI：
10.1080/14786435808244398
复制
发表时间：
1958-02
影响因子：
1.6
通讯作者：
D. Kuhlmann-wilsdorf
中科院分区：
文献类型：
--
作者：
D. Kuhlmann-wilsdorf
在面心立方晶格中，由空位在{111}面上凝聚而引起的堆垛层错，如果被一种能恢复晶格有序的半位错扫过，则转变为Frank-Read型位错源。位错源也会出现在其他主要的晶格类型，通过在紧密堆积的晶格平面上的空位凝聚。有人建议，这些是释放的大部分，如果不是全部，在塑性变形过程中形成的位错的位错源。除了几个小优点外，这种位错源的引入可以解释最常见晶格类型晶体中发现的所有重要滑动系统。
Abstract In the face-centred cubic lattice a stacking fault, caused by the condensation of vacancies on a {111} plane, is converted into a dislocation source of Frank-Read type if it is swept by a half-dislocation of a kind that restores lattice order. Dislocation sources will also arise in other major lattice types through the condensation of vacancies on close-packed lattice planes. It is proposed that these are the dislocation sources which release a major proportion, if not all, of the dislocations formed during plastic deformation. Besides several minor advantages, the introduction of this kind of dislocation source can account for all the important glide systems found in crystals of the most common lattice types.