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Ideal compressive strength of fcc Co, Ni, and Ni-rich alloys along the ⟨001⟩ direction: A first-principles study
We perform density functional theory based first-principles calculations to identify promising alloying elements (X) capable of enhancing the compressive uniaxial theoretical (ideal) strength of the fccNi-matrix along the 〈001〉direction. The alloying element belongs to a wide range of 3d, 4d, and 5d series with nominal composition of 6.25 at. %. Additionally, a full elastic study is carried to investigate the ideal strength of fcc Ni and fcc Co. Our results indicate that the most desirable alloying elements are those with half d-band filling, namely, Os, Ir, Re, and Ru.