Modeling of (121) Twin Boundaries in 2H Martensite

A Ostapovets and V Paidar, MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE, 465, 65-68 (2011).

DOI: 10.4028/www.scientific.net/KEM.465.65

The structures of 121 twin boundary in orthorhombic 2H martensite are modeled using Finnis-Sinclair type many-body interatomic potentials. The boundary corresponds to type-I twinning in 2H martensite of Cu-Al-Ni, Cu-Zn-Al and Au-Cd alloys. Three possible configurations of the 121 boundary are found. The structure with the lowest energy possesses a non-corrugated central 121 plane.

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