engleski

Distribution of dislocations on the Lüders band front during cold deformation in steel

The appearance of inhomogenous deformations, i.e. Lüders bands today is considered as significant problem in forming of different types of metals during cold deformation. Niobium microalloyed steels are one of the steels that show the appearance of inhomogeneous deformations during cold deformation and because of that, intensive research is carried out on these steels. The steel behavior during cold deformation can be monitored very well using methods thermography and digital image correlation. However, determination of the influence of dislocations and precipitates present in the microstructure of steel has not been investigated.The aim of this paper is to determine the distribution of dislocations and precipitates on the Lüders band front during propagation of the Lüders band through the deformation zone. In this research thermography and digital image correlation are used simultaneously with static tensile testing. Distribution of dislocations on the Lüders band front determined with transmission electron microscope.

steel, cold deformation, Lüders band, distribution of dislocations

nije evidentirano