TABLE OF CONTENTS YUNMIN YANG, NAOTO SEKIMURA, HIROAKI ABE
Department of Quantum Engineering and Systems Science, University of Tokyo
Email: yunmin@qs.t.u-tokyo ac.ip
In this study, an MD simulation of compression process was carried out for copper. An interstitial type dislocation loop was inserted in a perfect copper lattice, and then the lattice was deformed in a displacement-controlled manner. Slipping of prismatic dislocation were not observed for all simulation cases, for loops smaller than 0.6nm, atoms in loop were squeezed into the neighboring layer and form a crowdion bundle along <110> direction, which was then swept away by further deformation, for loops larger than 2nm, the inhabit plane was firstly inclined to bridge two neighboring layer and the former extrinsic stacking was broken into two parts with an intrinsic stacking in two successive plane, after this transformation, the deformation was accommodated by sequential slipping on these two successive planes respectively.
Irradiation-generated defects, especially the interstitial frank loops play a fundamental role in the deformation process of irradiated FCC material, and it has been proposed [1 ,2 ] that, during deformation, these frank loops were unfaulted to become prismatic perfect loops and then swept away by prismatic slipping. However, the in-situ observation of proton-irradiated stainless steel [3] showed that, unfaulting of frank loops in stainless steel is very difficult, some of the frank loop (as large as 200nm) kept to be faulted even they have been shear by a group of glide dislocation passed through, although the elimination of frank...
