Laminated metal composites(LMCs) are a unique composite material and have great application prospects in automobiles, ships, aircraft,and other manufacturing industries. As lightweight materials, the Mg/Al LMCs are ex...Laminated metal composites(LMCs) are a unique composite material and have great application prospects in automobiles, ships, aircraft,and other manufacturing industries. As lightweight materials, the Mg/Al LMCs are expected to combine the advantages of both Mg and Al alloys to broaden their application prospects. Roll-bonding is the most popular process for the fabrication of Mg/Al LMCs due to high production efficiency and good product quality stability. The roll-bonding process involves the deformation of the substrates and the formation of the interfacial diffusion layer. The latter will directly determine the interface bonding strength of Mg/Al LMCs. Bonding strength is very sensitive to the thickness of the reaction layer in the diffusion layer. When the thickness of the reaction layer exceeds 5 μm, the bonding strength decreases sharply. Therefore, controlling the thickness of the reaction layer is very important for the design of rolling parameters.The latest research also showed that the addition of intermediate layer metal and the construction of three-dimensional interfaces can further improve the interface bonding strength. How to apply these methods to roll-bonding is the focus of future research. Recently, a new rolling technique, corrugated roll/plat roll rolling+flat roll/flat roll rolling has been developed to fabricate Mg/Al LMCs. It can effectively promote the deformation of the hard layer and generate a wavy interface, resulting in the enhancement of the bonding quality and rolling quality.In the current review, the effects of rolling parameters and subsequent annealing on the interface structure of Mg/Al LMCs were elaborated in detail. The application of some special rolling techniques in the preparation of Mg/Al LMCs was also summarized. The latest research results on the relationship between interface structure and mechanical properties of Mg/Al LMCs were reviewed. Finally, further research directions in this field were proposed.展开更多
针对镁/铝层合板轧制过程中存在结合强度低、翘曲和边裂严重等技术难题,研究了基于点阵强变形轧制(Lattice severe deformation rolling,LSDR)原理以波纹辊对其一道次轧制成形。借助有限元数值计算分析了金属板材在复杂辊缝下的塑性流...针对镁/铝层合板轧制过程中存在结合强度低、翘曲和边裂严重等技术难题,研究了基于点阵强变形轧制(Lattice severe deformation rolling,LSDR)原理以波纹辊对其一道次轧制成形。借助有限元数值计算分析了金属板材在复杂辊缝下的塑性流动规律和成形特点,并进行了轧制实验。结果表明:LSDR原理轧制镁/铝层合板时,波纹辊能够对难变形的镁合金及结合界面处产生点阵状分布的局部强非均匀变形作用,增强镁合金沿轧向(Rolling direction,RD)和横向(Transverse direction,TD)的塑性流动,并在结合界面处产生更大的剪切应力。相较于传统平轧,LSDR原理轧制所得镁/铝层合板的抗拉强度、拉剪强度和抗弯强度均有提高,其中拉剪强度最大增幅达77%;并且结合界面均匀可靠,产生约5μm厚的扩散层。研究内容为高质量镁/铝层合板的制备提供了有价值的参考。展开更多
基金supported by Guangdong Major Project of Basic and Applied Basic Research,No. 2020B0301030006。
文摘Laminated metal composites(LMCs) are a unique composite material and have great application prospects in automobiles, ships, aircraft,and other manufacturing industries. As lightweight materials, the Mg/Al LMCs are expected to combine the advantages of both Mg and Al alloys to broaden their application prospects. Roll-bonding is the most popular process for the fabrication of Mg/Al LMCs due to high production efficiency and good product quality stability. The roll-bonding process involves the deformation of the substrates and the formation of the interfacial diffusion layer. The latter will directly determine the interface bonding strength of Mg/Al LMCs. Bonding strength is very sensitive to the thickness of the reaction layer in the diffusion layer. When the thickness of the reaction layer exceeds 5 μm, the bonding strength decreases sharply. Therefore, controlling the thickness of the reaction layer is very important for the design of rolling parameters.The latest research also showed that the addition of intermediate layer metal and the construction of three-dimensional interfaces can further improve the interface bonding strength. How to apply these methods to roll-bonding is the focus of future research. Recently, a new rolling technique, corrugated roll/plat roll rolling+flat roll/flat roll rolling has been developed to fabricate Mg/Al LMCs. It can effectively promote the deformation of the hard layer and generate a wavy interface, resulting in the enhancement of the bonding quality and rolling quality.In the current review, the effects of rolling parameters and subsequent annealing on the interface structure of Mg/Al LMCs were elaborated in detail. The application of some special rolling techniques in the preparation of Mg/Al LMCs was also summarized. The latest research results on the relationship between interface structure and mechanical properties of Mg/Al LMCs were reviewed. Finally, further research directions in this field were proposed.
基金National Natural Science Foundation of China(51101043,50801017,51001036)China Post-doctor Science Foundation(2011M500238)+1 种基金Fundamental Research Funds for the Central Universities(HIT.NSRIF.201130)"111" Project(12012)
