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Effect of secondary rolling on the interfacial bonding strength and mechanical properties of Al/Mg/Al clad plates
Philosophical Magazine Letters ( IF 1.2 ) Pub Date : 2022-04-22 , DOI: 10.1080/09500839.2022.2065702
Xiang Cao 1 , Chun Xu 1 , Yu Li 1 , Xuecheng Cao 1 , Ruizhi Peng 1 , Junyi Fang 2
Affiliation  

ABSTRACT

The effects of secondary rolling on the microstructure evolution and mechanical properties of Al/Mg/Al clad sheets have been investigated. The results indicate that a double-layer intermetallic compound (Mg2Al3 and Mg17Al12) forms and sandwiches the MgO film during the first rolling and annealing, while the sandwich structure shows a low peel strength owing to the intrinsic brittleness of intermetallic. However, a secondary rolling leads to a shear-induced breakage of the sandwich structure, whereupon the peel strength significantly increases from 1.3 N/mm to 12.7 N/mm on account of an effective bonding of the Mg/Al interface. The secondary rolling not only eliminates the influence of MgO on the interface, but also improves the bonding strength of the interface. Furthermore, the clad sheet can obtain an excellent elongation (21%) and remain of high interfacial strength (∼12 N/mm) after the recovery annealing.



中文翻译:

二次轧制对Al/Mg/Al复合板界面结合强度和力学性能的影响

摘要

研究了二次轧制对Al/Mg/Al复合板组织演变和力学性能的影响。结果表明,双层金属间化合物(Mg 2 Al 3和 Mg 17 Al 12) 在第一次轧制和退火过程中形成并夹住 MgO 薄膜,而夹层结构由于金属间化合物的固有脆性而表现出较低的剥离强度。然而,二次轧制导致夹层结构的剪切诱导断裂,因此由于 Mg/Al 界面的有效结合,剥离强度从 1.3 N/mm 显着增加至 12.7 N/mm。二次轧制不仅消除了MgO对界面的影响,而且提高了界面的结合强度。此外,复合板在恢复退火后可以获得优异的伸长率(21%)并保持高界面强度(~12 N / mm)。

更新日期:2022-04-22
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