论文部分内容阅读
采用累积叠轧法(ARB)对Mg/Al多层板材进行高周期ARB变形,利用光学显微镜(OM)、扫描电子显微镜(SEM)和能谱仪(EDS)研究了Mg/Al多层板材在ARB变形过程中的微观组织,并在拉伸试验机上测试板材的室温抗拉强度并通过扫描电子显微镜(SEM)观察拉伸试验后的断口形貌。结果表明,随着叠轧周期数的增加,Mg/Al多层复合材料层界面处生成并长大的金属间化合物明显细化,该化合物会逐渐呈连续多层状分布,同时也提高了层界面的结合程度。不过,Mg/Al多层复合材料的抗拉强度在叠轧过程中却呈现出不规则的变化趋势。
The high-cycle ARB deformation of Mg / Al multi-layer sheet was studied by the method of cumulative roll-to-roll (ARB). The effect of Mg / Al multilayer sheet on ARB deformation process of the microstructure and tensile testing machine at room temperature tensile strength test and scanning electron microscopy (SEM) observed after fracture tensile fracture morphology. The results show that the intermetallic compounds grown and grown at the interface of Mg / Al multilayered composites are obviously refined with the increase of the number of rolling cycles. The compound will gradually be in a multi-layered distribution and the layers The degree of interface. However, the tensile strength of Mg / Al multilayered composites shows an irregular trend in the course of stack rolling.