Interface characteristics study of Al/Mg laminated composite sheets by multi-passes RHR

MEI Ruibin; SHI XianLi; BAO Li; LI Changsheng; LIU Xianghua

doi:10.13801/j.cnki.fhclxb.20210902.006

Volume 39 Issue 7

Jul. 2022

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Article Navigation > Acta Materiae Compositae Sinica > 2022 > 39(7): 3485-3497

MEI Ruibin, SHI XianLi, BAO Li, et al. Interface characteristics study of Al/Mg laminated composite sheets by multi-passes RHR[J]. Acta Materiae Compositae Sinica, 2022, 39(7): 3485-3497. doi: 10.13801/j.cnki.fhclxb.20210902.006

Citation:

MEI Ruibin, SHI XianLi, BAO Li, et al. Interface characteristics study of Al/Mg laminated composite sheets by multi-passes RHR[J]. Acta Materiae Compositae Sinica, 2022, 39(7): 3485-3497. doi: 10.13801/j.cnki.fhclxb.20210902.006

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Interface characteristics study of Al/Mg laminated composite sheets by multi-passes RHR

doi: 10.13801/j.cnki.fhclxb.20210902.006

1.
Northeastern University at Qinhuangdao Branch, Northeastern University, Qinhuangdao 066004, China
2.
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China

Received Date: 2021-06-28
Accepted Date: 2021-08-16
Rev Recd Date: 2021-07-31

Available Online: 2021-09-03

Publish Date: 2022-07-30

Abstract

Abstract

In order to study the effect of rolling with heated roll on the microstructure and properties of laminated composites, Al/AZ31B/Al laminated composites were fabricated by multi-passes RHR in this paper. The influences of different reduction and annealing temperatures on the interfacial morphology and bonding properties of the composites were analyzed by OM, XRD, SEM and design mold tests. The results show that the rolling with heated roll has a deformation and promoting the formation of a diffusion layer, and the discontinuous diffusion layer is formed at bonding interface of composite sheets under high reduction. With the increase of the reduction, the bonding surface gradually presents a significant “wave” type from flat, and the shear slopes occur in pairs with similar angles. The excessive reduction leads to difficulty in the coordination of the deformation process of heterogeneous materials, and the cracks appear in some areas of the decreasing direction of the magnesium layer thickness. After annealing, the Al/Mg bonding interface forms more effective metallurgical bonding. With the increase of annealing temperature, the thickness of the diffusion layer increases, and there is a delamination phenomenon. The intermetallic compounds are Al₃Mg₂ (β phase) and Mg₁₇Al₁₂ (γ phase). The peeling morphology is quasi-cleavage fracture. When the annealing temperature is too high, the sheet-shaped intermetallic compound becomes thicker, and the two metal plates will be crackled from the intermetallic compound layer. When the reduction is 60%-70% and the annealing temperature is 200-250℃, the bonding strength of the composite sheet by multi-passes rolling with heated roll is improved.
- rolling with heated roll,
- Al/AZ31B/Al laminated composite,
- bonding interface,
- the intermetallic compounds,
- peeling,
- the bonding strength
Long Abstrsct
Innovation Points

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References(26)

References

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