Microscopic analysis sealer shear fracture process

Source:   Date:2014-10-28 15:46:34   Views:

Whether the process of plastic deformation of the material or fracture failure is from the local deformation and the crack begins, the deformation and fracture of these materials in the final analysis the atomic or molecular motion. When the plastic deformation is mainly the external force to break the inter-atomic force causing atoms of the original from the original position, the atomic bonds between atoms, but has not been destroyed. Failure is the role of the applied load makes the atom disconnect between atoms, atoms separated from each other. Movement also depends on the microstructure and mechanical properties of dry material stress suffered.
The main difference between the ordinary high-speed loads and loads of sealer material deformation at different speeds that locality, ranging from warm and strong shock wave effect. Thus materials under dynamic loading conditions and the general load deformation, dislocation movement inside the organization and morphology of materials formed are not identical. For example, when the high-speed range to reduce the loading of material deformation, plastic deformation of the section will also reduced; in the sealing and cutting machine load speed, the moving speed of the dislocations within the material is accelerated, the deformation of the width reduction of dislocations; when the speed reaches a certain when the critical value, the material will produce twins internal organization. with the formation of twinning organization, material plastic lower brittleness increased.