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以商业纯Mg和AA1050 Al板材为初始材料,采用累积叠轧技术在室温下进行不同轧制道次变形制备了Mg/Al多层复合板材料,并对3 cyc轧制的Mg/Al多层复合板材料在200℃分别进行不同时间退火处理.利用OM,SEM和中子衍射技术对微观组织和宏观织构进行了研究.结果表明,复合板材中Mg和Al层组织均随着循环次数的提高而细化;在200℃时随着退火时间的增加,晶粒逐渐均匀但没有明显长大.累积叠轧过程中Mg层主要呈现出典型的轧制织构类型,Al层则表现出以轧制织构组分为主,同时伴有剪切织构组分的混合织构类型.对于3 cyc轧制的Mg/Al多层复合板材,在200℃经不同时间退火后,Mg层依然为轧制织构类型,Al层为轧制织构与剪切织构组分混合.随着累积叠轧循环道次的增加,屈服强度和抗拉强度都逐渐上升.
Commercial Mg and AA1050 Al sheets were used as raw materials to prepare the Mg / Al multi-layer composite plate materials by using the accumulated roll-rolling technique at different rolling passes at room temperature. The composite plate materials were annealed at different temperatures at 200 ℃ .Microstructure and macrostructure were studied by OM, SEM and neutron diffraction techniques.The results showed that the microstructure and the microstructure of Mg and Al layers in the composite plate were all changed with the number of cycles And the grain size gradually increases with the increase of annealing time at 200 ℃, but the grain size gradually increases.While the Mg layer shows the typical rolling texture during the accumulative rolling process, the Al layer shows a The textures of the rolled textures are mainly composed of mixed textures with shear texture components. For the Mg / Al multi-layer composite sheet rolled by 3 cyc, after being annealed at 200 ℃ for different time, the Mg layer is still For the rolling texture type, the Al layer is a mixture of rolled textures and shear textured textures, both yield strength and tensile strength gradually increasing as the accumulative rolling cycles increase.