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. 2019 Mar 29;122(12):126102.
doi: 10.1103/PhysRevLett.122.126102.

Linear Complexions: Metastable Phase Formation and Coexistence at Dislocations

Vladyslav Turlo  1 , Timothy J Rupert  1   2
Affiliations

Linear Complexions: Metastable Phase Formation and Coexistence at Dislocations

Vladyslav Turlo et al. Phys Rev Lett. .

Abstract

The unique three-phase coexistence of metastable B2-FeNi with stable L1_{0}-FeNi and L1_{2}-FeNi_{3} is discovered near edge dislocations in body-centered cubic Fe-Ni alloys using atomistic simulations. Stable nanoscale precipitate arrays, formed along the compression side of dislocation lines and defined as linear complexions, were observed for a wide range of compositions and temperatures. By analyzing the thermodynamics associated with these phase transitions, we are able to explain the metastable phase formation and coexistence, in the process defining new research avenues for theoretical and experimental investigations.

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