Abstract
In this work, we have investigated the effect of W addition on microstructure and mechanical properties of equiatomic TiVCr medium entropy alloy films. It is found that a transition from amorphous phase to quasicrystal and nanocrystal occurs with increasing content of W, showing an improved crystallinity of the films. Hardness drastically increases with increasing W addition and reaches the maximum value of 7.2 GPa at 16.0 at% W content, which is two times higher than that of the initial sample. Amorphous phase strengthening, solid solution and precipitation strengthening become the dominant mechanism, responsible for the ultrahigh strengthening effect.
NSTL
Elsevier