Influence of the Rate and Degree of Deformation on the Texture, Structure and Mechanical Properties of Steel

V V Usov,N M Shkatulyak,D Fasmann,A A Bryukhanov

doi:10.1155/2014/397279

Abstract

The tests of uniaxial tensile by 10, 20, and 30% at strain rates of 0.1, 1, 60, 120, and 300 mm/min in rolling direction and transverse direction of recrystallized cold-rolled low-carbon steel sheets were carried out. The effect of rate and degree of deformation on the texture, structure, and mechanical properties were studied. The texture transformations and the growth of the anisotropy of mechanical properties with increasing strain rate up to 120 mm/min are explained by the effect of crystallographic intragranular slip and twinning of deformation mechanism. The further increase of deformation rate leads to texture scattering and decreasing of properties anisotropy, which are bound to the difficulty of intragranular sliding and activation of grain boundary sliding.

Highlights

The deformation of polycrystalline metal forms the preferential crystal orientation or texture
Activation of grain boundary sliding is not associated with the formation of crystallographic texture and leads to weakening and scattering texture that already exists in the material [6]
Tensile strain by 10 and 20% at the strain rates of 0.1 mm/min and 60 mm/min leads to the formation in a steel sheet of axial texture with the axis ⟨110⟩ parallel to the rolling direction

Summary

Introduction

The deformation of polycrystalline metal forms the preferential crystal orientation or texture. Type of texture depends on many factors, namely, circuit deformation, crystal structure of the metal, temperature, strain rate, and all. The nature of the texture that formed at different strain rates and temperatures of deformation during the mechanical tests remains often unclear. The study of the crystallographic texture of deformed polycrystals allows determining the mechanisms operating during plastic deformation of the metal and determining the nature of change of its physical-mechanical properties [3]. In [4] studied the effect of strain rate during the uniaxial tensile tests on the formation of the texture, but influence of the deformation degree in this case was not investigated

Objectives

Methods

Results

Conclusion