Geometrically necessary dislocations (GNDs) are a type of dislocation that are responsible for the deformation of materials. GNDs are formed when a material is subjected to mechanical stress and its crystal lattice is distorted in a way that prevents dislocation slip. This results in a build-up ...
DISLOCATIONS in crystalsTENSILE strengthSTRENGTH of materialsDIFFRACTION gratingsMeasurement of geometrically necessary dislocation (GND) density using electron backscatter diffraction (EBSD) has become rather common place in modern metallurgical research. The utility of this measure as an indica...
Reduction in step size also leads to separation of dislocations into GNDs and SSDs.doi:10.1016/j.ultramic.2012.11.003Jiang, J.Britton, T.B.Wilkinson, A.J.Elsevier B.V.UltramicroscopyJiang J, Britton T, Wilkinson A. 2013 Measurement of geometrically necessary dislocation density with high ...
dislocations (SSD) that trap each other randomly, or geometrically necessary dislocations (GND) that are responsible for the mismatch of slip at the grain boundaries 任意地互相设陷井的被存放的脱臼从塑料变形可以 (是) 统计地被存放的脱臼SSD,或者几何上负责 () 对滑动配错在晶界的必要的脱臼GND [...
The physical motivation behind the use of strain gradients has been based on the framework of geometrically-necessary dislocations (GNDs). A new but equivalent definition for Nye's dislocation tensor, a measure of GND density, is proposed, based on the integrated properties of dislocation lines ...
The volume change during austenite-to-martensite transformation was modeled, and the resultant prestrained areas in the ferrite were considered to be the storage place of transformation-induced, geometrically necessary dislocations (GNDs). The flow curves of DP steels with varying ferrite grain sizes,...
如题，手上有EBSD数据，但是不知道怎么通过EBSD数据求得geometrically necessary dislocations(GND)。
如题，手上有EBSD数据，但是不知道怎么通过EBSD数据求得geometrically necessary dislocations(GND)。
The evolution of geometrically necessary dislocation (GND) distribution in the deformed 6061 alloy is studied with electron back scatter diffraction (EBSD) and transmission electron microscope (TEM). In dynamic recrystallized state, the average GND density is 8.70 × 1014 m2 with grain size ~30 μ...
GNDplastic deformationprecipitatesorientation imaging microscopyprecipitation hardeningmodellingaluminium alloysmicrostructureThere has recently been a strong interest in modelling size-dependent plasticity in metals based on the concept of geometrically necessary dislocations (GNDs). However, the precise manner by ...