Computer Simulation of Deformation and Fracture of Small Metal Crystals
Body centered cubic iron whiskers having  and  axes were pulled in a super computer. The upper yeild stress close to the theoretical strength was found. After the upper yield stress, phase transformation was observed at the same time the stress was greatly reduced. A new posssible mechanism of twinning is proposed. The whiskers were pulled until it had broken into two pieces. Copper small crystals with and without a crack were sheared. It was observed that edge dislocations were created at the surface and moved through and escaped from the crystals.
KeywordsMolecular Dynamic Stress Strain Curve Edge Dislocation Interatomic Potential Centered Lattice
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