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Microstructure and Mechanical Properties of AA5052/AA6061 Layered Sheet Fabricated by Cold Roll-Bonding and Aging Treatment

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Abstract:

A cold roll-bonding (CRB) process is applied to fabricate a multi-layer Al sheet using AA5052 and AA6061 alloys. The rolling is performed for four-layer sheets in which AA5052 and AA6061 sheets are stacked alternately after surface treatments such as degreasing and wire brushing. The 4-layer sheets with a thickness of 8 mm were roll-bonded to 2 mm by rolling at total reduction of 75%. The as roll-bonded Al sheets are then processed by natural aging (T4) and artificial aging (T6) treatments. T4 and T6 treated specimens showed a typical recrystallization structure over all regions of AA5052 and AA6061. The average grain diameter of T4 and T6 specimens was about 15 μm, which is almost the same. In addition, the Al sheet showed a heterogeneous hardness distribution in thickness direction. After the aging treatments of T4 and T6, the strength rather decreased and the elongation increased. It is found that new multilayer Al sheets made of AA6061 and AA5052 alloys, exhibiting various mechanical properties can be fabricated through the CRB and subsequent aging treatments.

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Periodical:

Materials Science Forum (Volume 1194)

Pages:

39-44

DOI:

https://doi.org/10.4028/p-0c0Au1

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Online since:

June 2026

Authors:

Hyeon Jun Heo, Seong Hee Lee*

Keywords:

Aging Treatment, Aluminum, Cold Roll-Bonding, Mechanical Properties, Microstructure

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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