叠层结构Al3Cu合金的微观组织和力学性能研究

Study on Microstructure and Mechanical Properties of Laminate Structure Al3Cu Alloy

采用保温阶段不同连接压力扩散连接和液压的方法,研究叠层结构Al3Cu合金的微观组织和力学性能。结果表明,在保温阶段25 MPa连接压力时,Al3Cu合金的界面氧元素向相邻层均匀分散,粗晶区和细晶区充分结合,形成具有非均匀区域的叠层结构Al3Cu合金。界面处的平均硬度为329.18 HV,介于轧制层和退火轧制层之间。与80%轧制态相比,抗拉强度由301.44 MPa升至310.16 MPa,延伸率由4.1增至8.3,这表明实现了优异的强韧性匹配。

The microstructure and mechanical properties of laminate structure Al3 Cu alloy prepared by diffusion bonding under different bonding pressures during heat preservation and hydraulic pressure were studied.The results show that under the bonding pressure of 25 MPa during heat preservation, the oxide films on the interface of Al3 Cu alloy were evenly dispersed to the adjacent layers, and the coarse grain and fine grain regions were bonded by each other, forming a laminate structure with heterogeneous region.The average hardness at the interface is 329.18 HV,which is between rolling and annealing rolling layers.Compared with the rolled state, the tensile strength increases from 301.44 Mpa to 310.16 Mpa, and the elongation increases from 4.1 to 8.3,which realizes the excellent matching of strength and ductility.