Studying the Effects of Accumulative Roll Bonding Cycles on the Mechanical Properties of AA1050 Aluminum Alloy

Eman Elshenawy,Abdelrahman Alanany,Ahmed Essa,Ahmed El-Nikhaily

doi:10.21608/jpme.2021.69751.1080

Abstract

Accumulative Roll Bonding (ARB) is a prospective severe plastic deformation (SPD) process that can continuously produce bulk material and has good commercialization potential. This paper aims to study the effect of different ARB cycles in details on tensile strength, elongation, and strain-hardening coefficient. Aluminum sheets AA1050 were heated at 300⁰C, then rolled for a single pass with 67% reduction in thickness and air cooled. The produced sheet was cut and accumulative roll bonded (50% reduction) after reheating at 280⁰C with different ARB cycle regimes. The tensile testing was carried out at room temperature after different cycles of ARB. Ultimate tensile strength, elongation, and strain-hardening coefficient were determined. The results indicated that UTS after ARB is significantly improved by accumulative roll bonding achieving 121% of This improvement is attributed to the reduction of grain size and increasing the grain boundaries. However, the total elongation percentage were reduced, at which the elongation reduced by a factor 95% of AA1050.

Highlights

AA1050 unalloyed composition, used to manufacture some structural parts with specific properties, such as gaskets and capacitors made of aluminium foil, shell of electronic products, isolation network of electronic tubes, protective sheaths of wires and cables, nets, wiring cores and parts and decorations of airplane ventilation system [1]
Saito et al [3] found that severe plastic deformation (SPD) is one of the most effective technology to produce ultra-fine grained (UFG) materials, with a mean grain size smaller than 1μm, in bulk materials
The manufacturing of AA1050 were successfully produced through accumulative roll bonding technique

Summary

Introduction

AA1050 unalloyed (pure) composition, used to manufacture some structural parts with specific properties, such as gaskets and capacitors made of aluminium foil, shell of electronic products, isolation network of electronic tubes, protective sheaths of wires and cables, nets, wiring cores and parts and decorations of airplane ventilation system [1]. Saito et al [3] found that severe plastic deformation (SPD) is one of the most effective technology to produce ultra-fine grained (UFG) materials, with a mean grain size smaller than 1μm, in bulk materials. The UFG Al/Al are promising materials having prominent mechanical properties. Different SPD methods create ultra-fine-grained structures of high-angle grain boundaries, which means many obstacles against dislocation motions [26]. SPD produces uniform nanostructures having stable properties of the processed materials and not suffering from any defects or mechanical damage [7,8,9,10,11]. ARB is a prospective SPD process that can produce bulk material continuously and has a good potential for commercialization [12,13]. This paper aims to study the effect of different ARB cycles in details on tensile strength, elongation, and strain hardening coefficient

Objectives

Results

Conclusion