Atomistic simulation of kink structure on edge dislocation in bcc iron
Chen Li-Qun(陈丽群)a)b)†, Wang Chong-Yu(王崇愚)a)c), and Yu Tao(于涛)a)
a Central Iron and Steel Research Institute, Beijing 100081, China; b College of Sciences, Central South University of Forestry & Technology, Changsha 410004, China; c Department of Physics, Tsinghua University, Beijing 100084, China
Abstract Based on the general theory of dislocation and kink, we have constructed the three kink models corresponding to the 1/2 $\langle111\rangle${011} and 1/2 $\langle111\rangle${112} edge dislocations (EDs) in bcc Fe using the molecular dynamics method. We found that the geometric structure of a kink depends on the type of ED and the structural energies of the atom sites in the dislocation core region, as well as the geometric symmetry of the dislocation core and the characteristic of the stacking sequence of atomic plane along the dislocation line. The formation energies and widths of the kinks on the 1/2 $\langle111\rangle${011} and 1/2 $\langle111\rangle${112} EDs are calculated, the formation energies are 0.05 eV and 0.04 eV, and widths are 6.02b and 6.51b, respectively (b is the magnitude of the Burgers vector). The small formation energies indicate that the formation of kink in the edge dislocation is very easy in bcc Fe.
Received: 09 October 2006
Revised: 21 June 2007
Accepted manuscript online:
(Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.))
Fund: Project supported by the National
Basic Research Program of China (Grant No 2006CB605102) and the
Science Foundation of Central South University of Forestry {\&}
Technology, China (Grant No 06y016).
Cite this article:
Chen Li-Qun(陈丽群), Wang Chong-Yu(王崇愚), and Yu Tao(于涛) Atomistic simulation of kink structure on edge dislocation in bcc iron 2008 Chin. Phys. B 17 662
Effect of spatial heterogeneity on level of rejuvenation in Ni80P20 metallic glass Tzu-Chia Chen, Mahyuddin KM Nasution, Abdullah Hasan Jabbar, Sarah Jawad Shoja, Waluyo Adi Siswanto, Sigiet Haryo Pranoto, Dmitry Bokov, Rustem Magizov, Yasser Fakri Mustafa, A. Surendar, Rustem Zalilov, Alexandr Sviderskiy, Alla Vorobeva, Dmitry Vorobyev, and Ahmed Alkhayyat. Chin. Phys. B, 2022, 31(9): 096401.
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
