Influence of Wavy Bending on Microstructure and Mechanical Properties of a Rolled AZ31 Sheet

Tingting Liu,Yuyang Zhang,Zhiwen Du,Bo Song,Qingshan Yang,Hongbing Chen,Yanan Chen

doi:10.3390/met10020173

Abstract

In the present work, cross-wavy bending at room temperature was carried out to tailor the microstructure and stretch formability of rolled AZ31 sheets. Wavy bending processing generates profuse {10–12} twins and a tilt basal texture. Subsequent recrystallization annealing causes grain coarsening and enhances the intensity of twin-orientation. The combined use of wavy bending and annealing can maintain high tensile ductility and remarkably enhances the stretch formability of rolled AZ31 sheet. It can be mainly attributed to the non-basal texture in the wavy bent sheet which increases the thinning capability during in-plane tension.

Highlights

Mg and its alloys are currently receiving widespread attention, especially in the automobile industry, due to the low density and high specific strength [1,2]
kernel average misorientation maps maps (KAM) map indicates a low dislocation accumulation exists in the AR sheet
It is known that the twins with c-axis//transverse direction (TD) texture are mainly formed in the compressed region during the 3rd pass

Summary

Introduction

Mg and its alloys are currently receiving widespread attention, especially in the automobile industry, due to the low density and high specific strength [1,2]. A wavy bending method is used to tailor texture and improve stretch formability of path promote activation of multiple twinbending variations further randomize twin-texture rolled. Microstructure evolution and bendingbehavior method isof used to tailor texture and improve formability of rolled Mgannealing alloy sheet.were twinning. It shows multi-pass wavy bending can generate multiple twin variants in each grain and a tilt basal investigated. Their influences on mechanical properties and stretch formability were discussed. Analysis using an HKL Channel 5 System (Oxford system equipped in a JSM-6610, JEOL, Tokyo, Japan)

Results and Discussion

It showsinthe value

Frequency

Conclusions