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通过室温累积叠轧技术制备了Mg/Al多层复合板材,借助SEM、EDS、TEM和同步辐射CT形貌观察等先进表征手段对累积叠轧Mg/Al金属复合板材界面结合进行表征,揭示累积叠轧Mg/Al金属复合板材界面宏观结合状态以及微观界面结构。结果表明,Mg/Al复合板材界面总体上结合良好,没有明显孔洞和开裂,但板材内部仍然存在一些孔洞和局部微小裂纹。3次循环后Mg/Al界面处形成了厚度为150 nm的Mg_(17)Al_(12)层。Mg和Mg_(17)Al_(12)之间存在一种确定的晶体学位相关系[111]Mg_(17)Al_(12)//[1210]Mg、(110)Mg_(17)Al_(12)//(1011)Mg,而Mg_(17)Al_(12)和Al之间是否有位相关系并不明显。
Mg / Al multi-layer composite sheet was prepared by room temperature accumulative roll-rolling technique. The interface combination of the accumulated rolled Mg / Al composite sheet was characterized by means of SEM, EDS, TEM and synchrotron radiation (CT) Microstructure and Interface Structure of the Rolled Mg / Al Composite Sheet. The results show that the interface of Mg / Al composite board is well bonded with no obvious holes and cracks, but some holes and local micro-cracks still exist in the interior of the plate. After 3 cycles, Mg (17) Al 12 layer with a thickness of 150 nm was formed at the Mg / Al interface. There is a definite phase relationship between Mg and Mg_ (17) Al_ (12) [111] Mg_ (17) Al_ (12) // [1210] Mg, (110) Mg_ (17) Al_ // (1011) Mg, and whether Mg_ (17) Al_ (12) and Al are in any phase relationship is not obvious.