A Quantitative Method to Examine Through Thickness Texture Variation

S Saimoto,R G Kamat,P Van Houte,P Clarke

doi:10.1155/tsm.21.109

Abstract

Through thickness texture variation is a reality in commercial sheet stock. However, methods to quantitatively evaluate this variation and its effects are not readily available. In this study, it was shown that a hot rolled commercial aluminium sheet manifests variation in rolling texture components which can be detected by traverse scan of the peak intensity across the through thickness using tapered specimens. Moreover, this asymmetry can be correlated to the intensity asymmetry observed in pole figures. A quantitative analysis is possible if the ODF is generated using monoclinic symmetry with the transverse direction as the diad axis instead of the conventional orthorhombic symmetry.

Highlights

The through thickness texture variations in the as-rolled sheets have been observed (Wassermann and Grewen, 1962) sometime ago but their consequence on annealing texture and the resultant mechanical properties has been largely ignored
The purpose of this paper is to demonstrate that the through thickness texture variation can be quantitatively represented section by section if it is realized that the pole figures do not necessarily manifest orthorhombic symmetry in intensities their patterns may suggest so
A large asymmetry exists near the 1/4 thickness level

Summary

A QUANTITATIVE METHOD TO EXAMINE THROUGH THICKNESS TEXTURE VARIATION

Dept. of Materials and Metallurgical Engineering, Queen’s University, Kingston, Ontario, K7L 3N6, Canada. Of Materials and Metallurgical Engineering, Queen’s University, Kingston, Ontario, K7L 3N6, Canada. Of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, de Croylaan 2, B3001 Heverlee, Belgium (Received May 20, 1992; in final form August 3, 1992). It was shown that a hot rolled commercial aluminium sheet manifests variation in rolling texture components which can be detected by traverse scan of the peak intensity across the through thickness using tapered specimens. This asymmetry can be correlated to the intensity asymmetry observed in pole figures. KEY WORDS Pole figures, orientation distribution functions, through thickness texture variation, orthorhombic symmetry, monoclinic symmetry

INTRODUCTION

RESULTS AND DISCUSSION

CONCLUSIONS