Alloying effect on the ideal tensile strength of ferromagnetic and paramagnetic bcc iron

Abstract

Using ab initio alloy theory formulated within the exact muffin-tin orbitals theory in combination with the coherent potential approximation, we investigate Preprint submitted to Journal of Alloys and Compounds February 23, 2016 in the PM Fe-alloys but is of limited use in the case of the FFM Fe-based alloys. The different performance is attributed to the specific interplay between magnetism and volume change in response to uniaxial tension. We establish a strong correlation between the compositional effect on the ITS and the one on the shear elastic constant C ′ for the PM alloys and briefly discuss the relation between hardenability and the ITS.

Hybrid physics-based and machine learning tools for materials assessment

“…The DFT prediction of local FM and AFM domains in otherwise PM FCC Fe and SS-316, respectively, and their confirmation by the Ising model at finite temperature, has mechanical strength issues. These local magnetic domains can affect the phase [54][55][56], and thus mechanical strength of metallic systems, making vacancies even more critical to mechanical failure. Further, this implies magnetization of these materials could have a more significant impact on their mechanical strength than other metallic systems.…”