Improving Precipitation in Cryogenic Rolling 6016 Aluminum Alloys during Aging Treatment

This study systematically investigated the performance and microstructure characterization of cryogenic rolling (CR) and room-temperature rolling (RTR) Al-Mg-Si alloys. The result showed that the hardness of the CR alloys decreased at the early aging stage, but that the hardness of the RTR alloys in...

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Bibliographic Details
Published in:Materials 2023-04, Vol.16 (9), p.3336
Main Authors: Wang, Xucheng, Liu, Yu, Huang, Yuanchun
Format: Article
Language:English
Subjects:
Aging
Aging (metallurgy)
Alloys
Aluminum
Aluminum alloys
Aluminum base alloys
Anisotropy
Deformation
Hardness
Magnesium
Mechanical properties
Nitrogen
Precipitates
Precipitation hardening
Recrystallization
Research methodology
Room temperature
Silicon
Solid solutions
Solution heat treatment
Specialty metals industry
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Summary:This study systematically investigated the performance and microstructure characterization of cryogenic rolling (CR) and room-temperature rolling (RTR) Al-Mg-Si alloys. The result showed that the hardness of the CR alloys decreased at the early aging stage, but that the hardness of the RTR alloys increased at the early aging stage. Retrogression phenomena were apparent in the CR alloys at the early aging stage. Despite undergoing the same solid solution treatment, a few substructures were still observed in the CR alloys, and the degree of recrystallization in the CR alloys was significantly inferior to that in the RTR alloys. After aging for 50 h, the strength and precipitates' density in the CR 75 alloy were higher than that in the other alloys; this indicated that the substructures were beneficial to precipitation and precipitate growth. A precipitation strength model was employed to illustrate the precipitation contribution at different aging stages. The results showed that the CR 75 alloy obtained the strongest precipitation strengthening.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16093336