Mechanical behavior of the {310}[001] symmetrical tilt grain boundary in the pressure range between 30-400 GPa. (IMAGE)

Ehime University

Mechanical behavior of the {310}[001] symmetrical tilt grain boundary in the pressure range between 30-400 GPa.

Caption

Results indicate that grain boundary strength and motion, accommodated by either shear-coupled migration (SCM) or grain boundary sliding (GBS), strongly varies with pressure resulting in grain boundary hardening and weakening across a broad pressure range. Especially at pressure conditions of super-Earth exoplanets (~120-400 GPa), grain boundary weakening is observed with increasing depth during shear-coupled migration.

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S. Ritterbex and T. Tsuchiya

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