Fig. 6 | Scientific Reports

Fig. 6

From: On the nature of nano twin-induced shear band formation in a dispersion strengthened copper alloy under micro-mechanical loading

Fig. 6

Schematic representation showing the microstructural evolution of the precipitate-dispersed Cu matrix throughout distinct stages of plastic deformation; stage 1: The microstructure of the coarse-grained (CG) copper (Cu) alloy is characterized by a distribution of precipitate particles varying in size from several micrometers down to the nanometer scale. Stage 2: Shear localization occurs due to the formation of voids around the micron-size precipitate particles. Stage 3, The localized shear strains lead to the development of distinct shear bands. Stage 4: Within these shear bands, the high density of dislocations interacts with the nano-sized precipitate particles. This interaction reduces the critical strain required for deformation twinning, eventually resulting in the formation of nano twins within the shear bands.

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