Change in Crystal Orientation of a {100}<001> Pure Aluminum Single Crystal during Accumulative Roll Bonding

Abstract

A {100} 〈001〉 pure aluminum single crystal specimen was deformed by accumulative roll bonding (ARB) up to 9 cycles (εeq=7.18) with lubrication. The 5- and 9-cycle processes developed weakened textures composed of {123} 〈634〉 and {112} 〈111〉. The {100} 〈001〉 areas existed even after the 9th cycle. The area fraction of {100} 〈001〉 was almost the same as that of the 2-cycle processed specimen. The average area fraction of {100} 〈001〉 was 4.8%. The cross slips by primary slip pairs may play an important role in maintaining the {100} 〈001〉 area. In the 5-cycle processed specimen, {123} 〈634〉 bands were observed in not only the center layer but also the one-eighth thickness layers close to the specimen surfaces. After the 7th and 9th cycles, {112} 〈111〉 was observed to form by further crystal rotation from {123} 〈634〉.