Fabrication of Ti/Al/Mg laminated composites by hot roll bonding and their microstructures and mechanical properties

• 作者: Pengju WANG Zejun CHEN Hongtao HUANG Jianshu LIN Boxin LI Qing LIU
• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: Special Topic-Modeling and Simulation in Design and Manufacture of Composite Structures
• 页码范围: 192-201
• 页数: 10页
• 语种: 英文

摘要

Ti/Al/Mg laminated composites were successfully fabricated by hot roll bonding.The effects of the rolling reduction on the microstructural evolution and mechanical properties of the composites were explored.The results show that Ti/Al/Mg laminated sheets exhibit good interfacial bonding.The rolling reduction has a significant effect on the deformation inhomogeneity through the thickness of the Al layer.The initial grains of the Al layer near the Ti/Al interface are frag-mented into fine equiaxed grains,and the grains at the center and near the Al/Mg interface are elon-gated.The R-cube shear texture of the Al layer forms near the Ti/Al interface and permeates into the center layer in the samples with greater rolling reductions.The β-fiber rolling texture of the Al layer is observed near the Al/Mg interface and increases with the increase of rolling reduction.The stress-strain curves indicate that the fracture appears first in the Mg layer.With the increasing roll-ing reduction,the ultimate tensile and yield strength values increase,and the elongation up to the Mg layer fracture decreases.