Texture Evolution during High Temperature Plane Strain Compression of High Silicon Steels

Pablo Rodriguez-Calvillo; Yvan Houbaert

doi:10.4028/www.scientific.net/MSF.553.15

Paper Titles

Stress Distributions in an Annular Disk Possessing Stress Induced Material Anisotropy
p.1

Numerical Analysis of Triaxial Residual Stresses in Quenched 316H Stainless Steel
p.7

Texture Evolution during High Temperature Plane Strain Compression of High Silicon Steels
p.15

Fracture Toughness of Iron Boride Layers Obtained by Paste Boriding Process
p.21

Self-Affine Patterns of Boride Layers
p.27

Modeling and Simulation of Resin Filling and Cure Processes in Molds Partially Filled with Porous Media
p.33

On the Thermal Conductivity of Adhesively Bonded and Sintered Hollow Sphere Structures (HSS)
p.39

Influence of the Morphology of Joining on the Heat Transfer Properties of Periodic Metal Hollow Sphere Structures
p.45

Calculation of the Effective Thermal Conductivity in Composites Using Finite Element and Monte Carlo Methods
p.51

HomeMaterials Science ForumMaterials Science Forum Vol. 553Texture Evolution during High Temperature Plane...

Texture Evolution during High Temperature Plane Strain Compression of High Silicon Steels

Abstract:

High silicon steel is used for electrical applications because its electrical resistivity is increased and the magnetostriction is reduced. A silicon content up to 6.5 wt.-% gives excellent magnetic properties. The improvement of the magnetic properties stays in contrast with the lack of ductility of these alloys, making their thermo-mechanical processing difficult. The optimum final microstructure and texture depends on the final application of the material: extremely big grains with a Goss orientation ({110} <001>) are desired in transformers and grains with an average size of 100 -m and cube component ({100} <001>) are used in electrical motors. A series of plane strain compression (PSC) tests were performed on 3 electrical steels, with a silicon content from 1.8 to 4.1 wt.-%, in a temperature range of 800 to 1100°C, strain rates between of 0.5 and 5 s-1. Reductions and time between deformation and quenching were also varied in order to study the recrystallisation progress. Apparent activation energies for hot working, calculated using the hyperbolic sine equation, was in good agreement with literature and higher than the activation energy for self diffusion in iron. These values increase with the silicon content. The high temperature texture evolution was investigated by means of electron back scattering Diffraction (EBSD) technique, which allows the quantification of important texture components in function of the thermo-mechanical parameters applied during hot rolling and the plane strain compression tests. The hot rolled microstructures have shown an average grain size of 140 -m and a texture with a maximum on the cube fibre ({001} <-1-10>). The conventional α (<110> // RD) / γ (<111> // ND) fibre texture was developed after plane strain compression and their intensities depend on the deformation temperature and reduction. A similar tendency was observed for the fraction of static recrystallised grains.