The effects of Vanadium on the strength of a bcc Fe Σ3(111)[1-10] grain boundary

Details The effects of Vanadium on the strength of a bcc Fe Σ3(111)[1-10] grain boundary The effects of Vanadium on the strength of a bcc Fe Σ3(111)[1-10] grain boundary

2012-01-27

arxiv.org/abs/1201.5915v1

Physics

Condensed Matter

Materials Science

Scientific paper

The effects of micro-alloying element, vanadium, on a bcc Fe \Sigma 3(111)[1-10] symmetric tilt grain boundary strength are studied using density functional theory calculations. The lowest energy configuration of the grain boundary structure are obtained from the first-principles calculations. The substitutional and interstitial point defect formation energies of vanadium in the grain boundary are compared. The substitutional defect is prefered to interstitial one. The segregation energies of vanadium onto the grain boundary and its fractured surfaces are computed. The cohesive energy calculation of the grain boundary with and without vanadium show that vanadium strengthen the bcc iron \Sigma 3(111)[1-10] grain boundary.

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