Please consider attending the Seminar for Xiaolong Bai, Thursday, Dec. 3, 8:30 a.m. in ARMS B071, for Preliminary Exam topic “ Texture Evolution of Aluminum Alloy Sheets During Rolling and Annealing”

MATERIALS SCIENCE AND ENGINEERING

SEMINAR

“Texture Evolution of Aluminum Alloy Sheets During Rolling and Annealing”

By

Xiaolong Bai

Purdue MSE Preliminary Exam

Advisor:

Professor Kevin P. Trumble

ABSTRACT

Crystallographic texture is one of the main factors responsible for the plastic anisotropy of aluminum alloy sheets. So it is important to understand the microstructure and texture evolution during rolling and subsequent annealing process. Conventional rolling process is plane strain rolling where only strains along ND (normal direction) and RD (rolling direction) exist. But when the shear between the rolls and the sheet surface is high enough, non-plane strain condition can develop. For plane strain rolling process, Cube texture {100}<001> dominates during reversible hot rolling process and in the subsequent multi-stand hot rolling and cold rolling process, all the initial textures rotate to the stable end 𝛽 fibre rolling texture. In the final annealing process, Cube {100}<001> and R {124}<211> texture prevail; for non-plane strain deformation process, however, shear texture {001}<110> and {111} // ND prevail, both in the rolling and subsequent annealing process.

Conventional rolling process to produce aluminum sheets is energy intensive and the resulting textures, especially the Cube and Goss textures, are detrimental to surface quality and the formability of aluminum sheets. So a new shear-based single-step sheet processing technique-Large Strain Extrusion Machining (LSEM) is introduced in Prof. Trumble/Chandrasekar’s group.

Date:         Thursday, December 3, 2015

Time:      830 A.M.

Place:        ARMS B071