Sentence examples for behavior of fcc metals from inspiring English sources
Based on the theory of dislocation nucleation, a modified power law is proposed to predict the scaled behavior of fcc metals, which agrees well with the numerical and experimental data ranging from nanoscale to macro-scale.
This behavior is very different from what has been seen earlier in simulations of fcc metals where grain boundary sliding is the dominant mechanism for very small grain sizes.
A hyper-surface is therefore formulated to describe the combined size and strain rate effects on the plastic yield strength of fcc metals.
The plastic deformation of fcc metals (aluminum and copper in the current study) under nanometric cutting is achieved by dislocation activities, i.e., dislocation nucleation and motion.
It is known that dislocation nucleation and glide play key roles in the plastic deformation of fcc metals under mechanical machining.
The analysis covers single and polycrystals of fcc metals in three deformation modes (rolling, tension and torsion).
The predictions are validated with channel die compressed (CDC) experiments, and are consistent with inelastic deformation modes of fcc metals.
Experimental measurements of the grain boundary excess volume of fcc metals Cu and Ni have shown a difference of over 40%.
The crystallographic texture evolution is similar for both materials, being characterized by gradual crystallite rotations towards the stable end orientations typical of fcc metals.
Based on the above analyses, some conclusions can be drawn as follows: (1) The plastic deformation of fcc metals (aluminum and copper in the current study) under nanometric cutting is achieved by dislocation activities, i.e., dislocation nucleation and motion.
It is shown that at high strains the saturation flow stress and the total dislocation density can be scaled with the melting point, and the deformation process can be regarded as steady-state flow leading to a uniform description of the plastic behavior of these fcc metals at all temperatures.
