6061 Al/AZ31B Mg/6061 Al对称复合板的组织与力学性能  

Microstructure and Mechanical Properties of 6061 Al/AZ31B Mg/6061 Al Symmetrical Laminated Plate

作　　者：杨霞[1] 贺东升 杜晓钟[1] 王荣军 Yang Xia;He Dongsheng;Du Xiaozhong;Wang Rongjun(College of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Jinxi Industries Group Co.,Ltd,Taiyuan 030024,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]晋西工业集团有限责任公司,山西太原030024

出　　处：《稀有金属材料与工程》2021年第4期1223-1232,共10页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51504157);China Postdoctoral Science Foundation(2016M601288);Shanxi Province Science and Technology Major Special Project(20181102015)。

摘　　要：在理论分析与模拟计算的基础上,通过热轧制备了6061 Al/AZ31B Mg/6061 Al对称复合板,并对其组织结构和力学性能进行了研究。首先通过经典复合板理论计算得到了复合板中6061 Al的最佳包覆率,再通过有限元方法模拟得到了复合板的最佳压下率。依据理论分析和仿真计算得到了铝的最佳包覆率和复合板的最佳压下率,对6061 Al/AZ31B Mg/6061 Al复合板进行组坯,并在不同轧制温度、不同压下率和不同退火时间下进行了轧制实验,最后对实验得到的复合板进行了拉伸性能测试、微观组织和能谱分析。结果表明,在复合板的复合界面处的镁层中发现了再结晶晶粒,且界面上形成了由Mg_(17)Al_(12)和Mg_(2)Al_(3)组成的金属间化合物;随着轧制压下率的增大,6061 Al/AZ31B Mg/6061Al复合板的抗拉伸强度、延伸率和界面扩散厚度显著增大;随着轧制温度的升高,复合板的抗拉伸强度、延伸率和界面扩散厚度也增大;而随着退火时间的增加,复合板的抗拉伸强度降低,但界面扩散厚度增加。Based on theoretical and simulation analysis, the 6061 Al/AZ31 B Mg/6061 Al laminated plates were fabricated by hot rolling, and the microstructure and mechanical properties were investigated. The best coverage rate of 6061 Al of the laminated plate was obtained by classical laminated plate theory and the optimal reduction rate of the laminated plate was obtained by finite element method(FEM). According to the theoretical and simulation results, the rolling experiments of 6061 Al/AZ31 B Mg/6061 Al laminated plate were carried out under different rolling temperatures, reduction rates and annealing time. And the microstructure experiment, tensile property test and energy spectrum analysis of the laminated plates were carried out. The results show that refined grains are discovered in the Mg layer at the interface, and the formation of an intermetallic compound layer consisting of Mg_(17)Al_(12)and Mg_(2)Al_(3) is identified at the interface. For the mechanical properties, with the increase of rolling reduction rate, the tensile strength, elongation and interface diffusion thickness of the 6061 Al/AZ31 B Mg/6061 Al laminated plate increase significantly;with the increase of rolling temperature, the tensile strength, elongation and interface diffusion thickness of the laminated plate decrease greatly;with the increase of annealing time, the tensile strength decreases and interface diffusion thickness of the laminated plate increases.

关 键 词：多层复合材料 界面结合强度 层间组织演变 结合层厚度 

分 类 号：TB331[一般工业技术—材料科学与工程]