期刊
MATERIALS
卷 14, 期 15, 页码 -出版社
MDPI
DOI: 10.3390/ma14154200
关键词
Al-Mg-Si alloy; accumulative roll bonding; aging treatment; heterogeneous materials
类别
资金
- National Natural Science Foundation of China [U19A2084]
- NSFC [51790483]
An alloy design strategy based on accumulative roll bonding was developed to produce aluminum laminates of similar materials. TRC sheets of the same composition but different cooling rates were roll bonded up to three cycles, showing significant recrystallizations and nano-precipitations that promoted precipitation strengthening. Subsequent aging was conducted for better mechanical properties.
As the applications of heterogeneous materials expand, aluminum laminates of similar materials have attracted much attention due to their greater bonding strength and easier recycling. In this work, an alloy design strategy was developed based on accumulative roll bonding (ARB) to produce laminates from similar materials. Twin roll casting (TRC) sheets of the same composition but different cooling rates were used as the starting materials, and they were roll bonded up to three cycles at varying temperatures. EBSD showed that the two TRC sheets deformed in distinct ways during ARB processes at 300 degrees C. Major recrystallizations were significant after the first cycle on the thin sheet and after the third cycle on the thick sheet. The sheets were subject to subsequent aging for better mechanical properties. TEM observations showed that the size and distribution of nano-precipitations were different between the two sheet sides. These nano-precipitations were found to significantly promote precipitation strengthening, and such a promotive effect was referred to as hetero-deformation induced (HDI) strengthening. Our work provides a new promising method to prepare laminated heterogeneous materials with similar alloy TRC sheets.
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