Microstructure evolution of a modified AA5083 aluminum alloy during a multistage homogenization treatment

Radetić, Tamara; Popović, Miljana; Romhanji, Endre

doi:10.1016/j.matchar.2011.12.006

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2012

Authors

Radetić, Tamara
Popović, Miljana
Romhanji, Endre

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Abstract

The microstructure evolution of the industrially cast AA5083 modified aluminum alloy during the multistage homogenization treatment was investigated by means of optical, SEM and TEM imaging and microanalysis techniques. The effect of microsegregations on the precipitates structure was evaluated. Eutectic constituent Al-6(Fe,Mn) and Mg2Si particles form in interdendritic regions, while nu-Al-11(Mn,Cr)(4) dispersoids were observed in the dendrite cores. Homogenization treatments lead to a partial dissolution of the precipitates present in the as-cast state and formation of the new phases: rod-shaped Al-6(Mn,Fe) and Al18Mg3(Mn,Cr)(2) dispersoids in the dendrite cores. Published by Elsevier Inc.

Keywords:

AA5083 alloy / Homogenization / Microsegregation / Al-6(Mn,Fe) precipitates / nu-Al-11(Mn,Cr)(4) dispersoids / Al18Mg3(Mn,Cr)(2) dispersoids

Source:
Materials Characterization, 2012, 65, 16-27

Publisher:

Elsevier Science Inc, New York

Funding / projects:

Ministry of Education and Science, Republic of Serbia
Office of Science, Office of Basic Energy Sciences, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34018/RS// (RS-34018)
EUREKA E!4569

DOI: 10.1016/j.matchar.2011.12.006

ISSN: 1044-5803

WoS: 000302584200003