Texture Evolution of the Mg/Al Laminated Composite by Accumulative Roll Bonding at Ambient Temperature

摘要:

以商业纯Mg、纯Al板材为初始材料，采用累积叠轧法 (ARB) 在室温下成功制备出Mg/Al多层复合板材。在累积叠轧过程中，复合板材中Mg层和Al组织随着循环次数的提高而细化。通过中子衍射技术对复合板材的织构进行测试后表明：在初始复合后的Al/Mg/Al三明治复合板材中，Mg层和Al层主要织构类型均为剪切织构。而在后续的累积叠轧过程当中，由于其工艺特点，导致Mg层和Al层中轧制织构组分出现，最终Mg层主要呈现出典型轧制织构而Al层则表现出以轧制织构组分为主并伴有剪切织构的混合织构类型

Abstract:

The Mg/Al laminated composites were prepared by the accumulative roll bonding (ARB) at ambient temperature using the commercial pure magnesium and pure Al sheets as starting materials. Microstructure of both Mg and Al layer were refined during ARB processing. Neutron diffraction was employed to investigate the texture evolution of this kind of laminated composite. Both the Mg and Al layer of the primary sandwich exhibited dominant shear texture. During the following accumulative roll bonding, the texture of Mg layer transformed to typical rolling texture while the Al layer showed a combined texture type including evident β fiber and the Rotate Cube component