Martensitic transformation of pure iron at a grain boundary: Atomistic evidence for a two-step Kurdjumov-Sachs–Pitsch pathway | Zendy

Jerome Meiser | Zendy; Herbert M. Urbassek | Zendy

Open Access

Martensitic transformation of pure iron at a grain boundary: Atomistic evidence for a two-step Kurdjumov-Sachs–Pitsch pathway

Author(s) -

Jerome Meiser,

Herbert M. Urbassek

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4961739

Subject(s) - materials science , diffusionless transformation , martensite , austenite , grain boundary , nucleation , molecular dynamics , merge (version control) , crystallography , phase boundary , thermodynamics , phase (matter) , condensed matter physics , metallurgy , chemistry , physics , microstructure , computational chemistry , organic chemistry , information retrieval , computer science

Using classical molecular dynamics simulations and the Meyer-Entel interaction potential, we study the martensitic transformation pathway in a pure iron bi-crystal containing a symmetric tilt grain boundary. Upon cooling the system from the austenitic phase, the transformation starts with the nucleation of the martensitic phase near the grain boundary in a plate-like arrangement. The Kurdjumov-Sachs orientation relations are fulfilled at the plates. During further cooling, the plates expand and merge. In contrast to the orientation relation in the plate structure, the complete transformation proceeds via the Pitsch pathway

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