Ideal tensile strength of random alloys

The ideal tensile strength (ITS) is the upper bound strength of materials and has been accepted as an essential mechanical parameter of single crystal materials. The experimental data on the ideal strength are rather limited. The few available values were obtained from tensile tests for whiskers and from nanoindentation experiments. In recent years, considerable attention has been paid to the computation of the ITS of elements or ordered alloys by first-principle methods. In spite of all these theoretical efforts, the first-principles description of the ITS in random solid solutions is rather limited. Here, we use the all-electron exact muffin-tin orbitals method (EMTO) in combination with the coherent-potential approximation (CPA) to investigate the ITS of random alloys, such as technologically important V-based alloys and Fe-based alloys.

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