Effect of TiO۲ nanoparticles on the bond strength of CP Ti sheet by cold Rolling method

In this work, the strength of cold roll bond of the commercially pure titanium (CP Ti) sheet and the effect of TiO۲ nanoparticles on bond strength was investigated. Through the accumulative roll bonding process, which is considered among the important severe plastic deformation processes, the creation of suitable bonds plays a significance role in the ultimate strength of the bond. Thus, researchers first study the optimum bonding parameters of two or several metals producible via ARB method and, then, manufacture it. In the present work, the bond strength of the commercially pure titanium sheets was investigated and found that by applying a ۵۰% thickness reduction a desirable bond strength is achieved based on the results of the peeling test for CP Ti. To study the effect TiO۲ nanoparticles on nanocomposite preparation in ARB test, these nanoparticles were dispersed between the CP Ti sheets at ۰.۱, ۰.۳, and ۰.۵wt% concentrations; the results show a decrease in bond strength during the peeling test by the increase in TiO۲ content. The scanning electron microscopy tests of the peeled sites revealed that the presence of cumulative layers of nanoparticles prevents bonding in these areas. Although the addition of TiO۲ nanoparticles results in the reduced bond strength, at TiO۲ percentages, equal or less than ۰.۵wt.% this decrease is negligible. Hence, ARB method can be considered as an efficient technique for preparation of bulk composite at room temperature.

کلیدواژه ها:

CP Ti ، cold roll ، TiO۲ nanoparticles ، Bond strength