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Thermo-mechanical properties of Cr–Co–Ni alloys from longitudinal spin fluctuation theory

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Accounting for longitudinal spin fluctuations in the paramagnetic state, we calculate elastic constants and stacking fault energy as a function of temperature and chemical composition for Cr–Co–Ni alloys. The longitudinal… Click to show full abstract

Accounting for longitudinal spin fluctuations in the paramagnetic state, we calculate elastic constants and stacking fault energy as a function of temperature and chemical composition for Cr–Co–Ni alloys. The longitudinal spin fluctuations are demonstrated to be important for the quantitative description of the thermo-mechanical properties and the corresponding chemical and temperature dependences. Replacing Ni with Cr and Co is found to yield opposite influence on the mechanical properties at finite temperature. A high thermal stability in plasticity is predicted in the low Cr regime in Cr–Co–Ni alloys, while a good thermal stability in elasticity can be achieved in the high Cr and low Co regime. The present advance in thermo-chemical-magnetic-property enhances the understanding required for an intelligent design of multicomponent alloys toward high-technology applications.

Keywords: properties alloys; longitudinal spin; thermo mechanical; mechanical properties; alloys longitudinal

Journal Title: Applied Physics Letters
Year Published: 2021

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