Festigkeitsabfall in Stahldrähten beim Feuerverzinken

Abstract

Wire steels C80D and C80D Nb obtained by hot dip galvanizing procedure were investigated by optical and electron microscopy as well as by X-ray analysis. The investigations were carried out at different stages of production of wires. The results of the investigations were checked by micro-hardness measurements. Arising of cracks in wires surface during hot dip galvanizing as a reason for decrease in tensile strength was established. Influences of technological parameter such as galvanizing velocity, type of cooling and residual stresses and strength of wires before galvanizing on cracking of wire was taken in consideration.

Analysis of X‐ray extinction in crystals with inhomogeniously distributed dislocations

“…The procedure was developed by [14][15][16] according to the condition of validity of geometrical optics in distorted crystals, introduced by Authier and Balibar [5] and thoroughly analysed by [10]. The expression for the calculation of the primary extinction is given as:…”

“…A treatment of dislocation-induced X-ray extinction based on the statistical dynamical theory of diffraction [8,9] can be correct and adequate but no practicable solution of the theory is hitherto available. Phenomenological treatments of the X-ray extinction were carried out by [10,11] for substructure analysis in deformed silicon single crystals with homogenously distributed (non-correlated) dislocations. An attempt of using procedure [10] for substructure analysis of metallic crystals doesn't yield any reasonable results.…”

“…Phenomenological treatments of the X-ray extinction were carried out by [10,11] for substructure analysis in deformed silicon single crystals with homogenously distributed (non-correlated) dislocations. An attempt of using procedure [10] for substructure analysis of metallic crystals doesn't yield any reasonable results. The reason for the failure is strong correlations of dislocations in the metallic crystals.…”