Bonding enhancement of cold rolling TA1 P-Ti/AA6061 composite plates via surface oxidation treatment

TA1 P-Ti/AA6061 composite plate was produced by oxidizing the surface of the titanium plate and adopting a cold roll bonding process.The results revealed that the oxide film(Ti6O)prepared on the surface of TA1 pure titanium was easy to crack during the cold roll bonding,thereby promoting the formation of an effective mechanical interlock at the interface,which can effectively reduce the minimum reduction rate of the composite plates produced by cold rolling of titanium and aluminium plates.Moreover,the composite plate subjected to oxidation treatment exhibited high shear strength,particularly at a 43%reduction rate,achieving a commendable value of 117 MPa.Based on oxidation treatment and different reduction rates,the annealed composite plates at temperatures of 400,450,and 500°C displayed favorable resistance to interface delamination,highlighting their remarkable strength-plasticity compatibility as evidenced by a maximum elongation of 31.845%.

Grf/6061 Al复合材料表面铈氧化膜耐蚀特性研究

碳纤维增强铝基复合材料具有高比强度、高比模量等优异的力学性能,在航空航天领域有着极广泛的应用前景。然而,石墨纤维增强铝基复合材料在使用过程中极易发生多种形式的腐蚀破坏。利用SEM、EDS、全浸泡试验、极化曲线测试等手段,对Grf/6061Al复合材料表面不同成膜时间的稀土转化膜耐蚀性能进行了探讨。结果表明:稀土转化膜成膜完整时能有效阻碍氧和电子的迁移,从而使材料腐蚀电位(?)corr上升,腐蚀电流密度icorr显著减小,点蚀敏感性下降,耐蚀性能显著提高;稀土膜成膜不完整时,不能有效阻碍氧和电子的迁移,相反由于成膜过程对材料的腐蚀作用,导致材料耐腐蚀性不佳甚至有所降低。