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Effects of processing conditions on texture and microstructure evolution in extra-low carbon steel during multi-pass asymmetric rolling

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journal contribution
posted on 2018-07-31, 00:00 authored by Satyaveer Singh Dhinwal, Laszlo S Toth, Peter HodgsonPeter Hodgson, Arunansu Haldar
Multi-pass rolling was carried out on extra-low carbon steel at room temperature by imposing different ratios of asymmetry in the roll-diameters as well as by conventional mode. The aim of this study is to understand the effect of shear deformation due to the asymmetric conditions on the development of the rolling texture and the possibilities of propagating the shear deformation into the mid-thickness area of the sheet. The trends of the measured texture developments in both symmetric and asymmetric rolling indicate their dependence primarily on the stability and fraction of the Goss {110}<001> and the rotated cube {001}<111> orientations. The effects of asymmetry conditions were further examined on the microstructure evolution and were correlated to the increased orientation inhomogeneity and grain fragmentation. Both texture and microstructure development showed their dependence on the applied thickness reduction per pass, on the total thickness reduction of the sheet as well as on the degree of the imposed asymmetry. It was found that shear textures can be obtained by asymmetric rolling at conditions where all three parameters-asymmetry ratio, strain in one pass, and the total accumulated strain-are as large as possible.

History

Journal

Materials

Volume

11

Issue

8

Article number

1327

Pagination

1 - 23

Publisher

MDPI

Location

Basel, Switzerland

ISSN

1996-1944

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2018, the authors