Effects of thickness ratios on microstructure and mechanical characteristics of AA6063/AA7072 composite plates by differential temperature rolling
In the present work, AA6063/AA7072 composite plates were fabricated by the differential temperature rolling (DTR) with different thickness ratios (HAA6063:HAA7072). The effects of different thickness ratios on interfacial bonding characteristics and mechanical properties of composite plates were inv...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025021589 |
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| Summary: | In the present work, AA6063/AA7072 composite plates were fabricated by the differential temperature rolling (DTR) with different thickness ratios (HAA6063:HAA7072). The effects of different thickness ratios on interfacial bonding characteristics and mechanical properties of composite plates were investigated. Changes in grain structure, interfacial microstructure, and tensile and peeling properties were analyzed using scanning electron microscopy, energy-dispersive spectroscopy, electron backscatter diffraction, and universal testing machine. The interfacial microstructure results revealed that the AA6063/AA7072 composite plates exhibit good interfacial bonding, accompanied by significant grain refinement near the interface. However, an oxide layer was existed at the rolling interface of the composite plates. As the thickness ratio decreases, the oxide layer transitioned from a continuous thick layer to a discontinuous thick layer, and ultimately nearly disappeared at a thickness ratio of 1:3. The AA7072 and AA6063 layers predominantly consisted of substructured grains and deformed grains, respectively, with some recrystallized grains observed in the AA6063 layer. The peel strength and tensile strength of the composite plates showed an increasing trend with the thickness ratios decreasing, up to 52.1 N/cm and 417.5 MPa, respectively, while the elongation dropped to only 8.26 %. |
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| ISSN: | 2590-1230 |