Atomistic simulation studies on deformation mechanism of nanocrystalline cobalt

Decomposition of Fe5C2catalyst particles in carbon nanofibers during TEM observation

“…Thus, these forces are able to maintain the stress in a Fe 5 C 2 catalyst particle inside a nanofiber. Such a supposition is confirmed by the experimental observation of twin defects in some of the particles that exploded; for nanocrystals of such a size, the deformation is realized predominantly through the twinning process; thus, deformation can result in the generation of deformation twins [25]. In our case, the twinning may be the result of the relaxation of the internal stress of the particle.…”

Deformation processes in [112¯0]-textured nanocrystalline Mg by mole

“…Relatively little attention has been paid to nanocrystalline hexagonal close-packed (hcp) metals such as Mg, Ti, Co, and Zr despite their industrial importance. One MD study of 3-D nanocrystalline hcp Co identified both an extended and a partial dislocation [23]. In addition, it was found that mechanical twinning seldom took place during deformation, even at high stress levels.…”

Controlling factors in tensile deformation of nanocrystalline cobalt and nickel

“…The propensity for tensile failure and its correlation to strain hardening and strain rate sensitivity could be universal to various nc materials. [14][15][16][17][18] One key aim of this work is to uncover these underlying linkages by orchestrating findings among microstructure characteristics, materials deformation parameters, and macroscopic tensile behavior. We arrange this paper according to the following scheme.…”