Evolution of texture and microstructure during accumulative roll bonding of aluminum AA5086 alloy

TL;DR

This study investigates how accumulative roll bonding affects the texture and microstructure of AA5086 aluminum alloy, revealing grain refinement, strong texture development, and significant strengthening after multiple passes.

Contribution

It provides detailed microstructural and mechanical evolution data during ARB of AA5086, highlighting the formation of submicron subgrains and texture development.

Findings

Submicron subgrains (~200-300 nm) form inside the microstructure.

Material develops a strong FCC rolling texture.

Proof stress increases over three times after 8 passes.

Abstract

In the present investigation, a strongly bonded strip of an aluminium-magnesium based alloy AA5086 is successfully produced through accumulative roll bonding (ARB). A maximum of up to eight passes has been used for the purpose. Microstructural characterization using electron backscatter diffraction (EBSD) technique indicates the formation of submicron sized (~200-300 nm) subgrains inside the layered microstructure. The material is strongly textured where individual layers possess typical FCC rolling texture components. More than three times enhancement in 0.2% proof stress (PS) has been obtained after 8 passes due to grain refinement and strain hardening